diff --git a/docs/dictionary/message/systemAppearanceChanged.lcdoc b/docs/dictionary/message/systemAppearanceChanged.lcdoc
new file mode 100644
index 00000000000..3d35b86bfbc
--- /dev/null
+++ b/docs/dictionary/message/systemAppearanceChanged.lcdoc
@@ -0,0 +1,35 @@
+Name: systemAppearanceChanged
+
+Type: message
+
+Syntax: systemAppearanceChanged
+
+Summary:
+Sent to the <current card> of the <defaultStack> when the <system appearance|systemAppearance>
+changes.
+
+Associations: card
+
+Introduced: 1.0
+
+OS: mac, ios, android
+
+Platforms: desktop,mobile
+
+Example:
+on systemAppearanceChanged
+    if the systemAppearance is "dark" then
+        set the backColor of me to "black"
+        set the foreColor of me to "white"
+    else
+        set the backColor of me to "white"
+        set the foreColor of me to "black"
+    end if
+on systemAppearanceChanged
+
+Description:
+Handle the <systemAppearanceChanged> <message> if you need to change the color
+of objects when the application enters either light or dark mode.
+
+References: systemAppearance (property), message (glossary), defaultStack (property)
+
diff --git a/docs/dictionary/property/systemAppearance.lcdoc b/docs/dictionary/property/systemAppearance.lcdoc
new file mode 100644
index 00000000000..94e2d77fc06
--- /dev/null
+++ b/docs/dictionary/property/systemAppearance.lcdoc
@@ -0,0 +1,30 @@
+Name: systemAppearance
+
+Type: property
+
+Syntax: get the systemAppearance
+
+Summary:
+Determins if the system appearance is dark or light mode. 
+
+Introduced: 9.6
+
+OS: mac, android, ios
+
+Platforms: desktop, mobile
+
+Example:
+if the systemAppearance is "dark" then
+    set the backColor of me to "black"
+    set the foreColor of me to "white"
+else
+    set the backColor of me to "white"
+    set the foreColor of me to "black"
+end if
+
+Description:
+The <systemAppearance> property returns either "dark" or "light" depending on
+whether the application is running in a dark mode context or not. On windows
+and linux the property will return "light".
+
+References: systemAppearanceChanged (message)
diff --git a/docs/notes/bugfix-22607.md b/docs/notes/bugfix-22607.md
new file mode 100644
index 00000000000..573ce305e20
--- /dev/null
+++ b/docs/notes/bugfix-22607.md
@@ -0,0 +1,7 @@
+# Dark mode detection
+
+A new `systemAppearance` property has been added which returns `dark` if
+the application is running in dark mode and `light` otherwise.
+
+A new `systemAppearanceChanged` message is now sent to the current card of the
+defaultStack when the system appearance changes.
\ No newline at end of file
diff --git a/engine/src/desktop-dc.cpp b/engine/src/desktop-dc.cpp
index 45422fd8f97..9e16846a84f 100644
--- a/engine/src/desktop-dc.cpp
+++ b/engine/src/desktop-dc.cpp
@@ -944,6 +944,13 @@ void MCScreenDC::closeIME()
 
 ////////////////////////////////////////////////////////////////////////////////
 
+void MCScreenDC::getsystemappearance(MCSystemAppearance &r_appearance)
+{
+	MCPlatformGetSystemProperty(kMCPlatformSystemPropertySystemAppearance, kMCPlatformPropertyTypeInt32, &r_appearance);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
 extern bool MCListSystemPrinters(MCStringRef &);
 extern MCPrinter *MCCreateSystemPrinter(void);
 
diff --git a/engine/src/desktop-dc.h b/engine/src/desktop-dc.h
index 430349141da..0743af1ab32 100644
--- a/engine/src/desktop-dc.h
+++ b/engine/src/desktop-dc.h
@@ -142,7 +142,9 @@ class MCScreenDC: public MCUIDC
     
     // MW-2014-04-26: [[ Bug 5545 ]] Override this method to defer to the MCPlatform method.
     virtual void hidecursoruntilmousemoves(void);
-    
+	
+	virtual void getsystemappearance(MCSystemAppearance &r_appearance);
+	
 	//////////
 	
 	bool isbackdrop(MCPlatformWindowRef window);
diff --git a/engine/src/desktop.cpp b/engine/src/desktop.cpp
index f2c00257d9f..1a5dfa8519b 100644
--- a/engine/src/desktop.cpp
+++ b/engine/src/desktop.cpp
@@ -164,6 +164,16 @@ void MCPlatformHandleScreenParametersChanged(void)
 
 ////////////////////////////////////////////////////////////////////////////////
 
+void MCPlatformHandleSystemAppearanceChanged(void)
+{
+	if (MCscreen == nil)
+		return;
+	
+	MCscreen -> delaymessage(MCdefaultstackptr -> getcurcard(), MCM_system_appearance_changed);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
 #if defined (FEATURE_PLATFORM_WINDOW)
 void MCPlatformHandleWindowCloseRequest(MCPlatformWindowRef p_window)
 {
diff --git a/engine/src/exec-interface2.cpp b/engine/src/exec-interface2.cpp
index 08dd8010fda..f873fd9475a 100644
--- a/engine/src/exec-interface2.cpp
+++ b/engine/src/exec-interface2.cpp
@@ -432,6 +432,21 @@ static MCExecEnumTypeInfo _kMCInterfaceSelectionModeTypeInfo =
 	_kMCInterfaceSelectionModeElementInfo,
 };
 
+//////////
+
+static MCExecEnumTypeElementInfo _kMCInterfaceSystemAppearanceElementInfo[] =
+{
+	{ "light", 0, false },
+	{ "dark", 1, false },
+};
+
+static MCExecEnumTypeInfo _kMCInterfaceSystemAppearanceTypeInfo =
+{
+	"Interface.ProcessType",
+	sizeof(_kMCInterfaceSystemAppearanceElementInfo) / sizeof(MCExecEnumTypeElementInfo),
+	_kMCInterfaceSystemAppearanceElementInfo,
+};
+
 ////////////////////////////////////////////////////////////////////////////////
 
 MCExecEnumTypeInfo *kMCInterfaceLookAndFeelTypeInfo = &_kMCInterfaceLookAndFeelTypeInfo;
@@ -441,6 +456,7 @@ MCExecEnumTypeInfo *kMCInterfacePaintCompressionTypeInfo = &_kMCInterfacePaintCo
 MCExecEnumTypeInfo *kMCInterfaceProcessTypeTypeInfo = &_kMCInterfaceProcessTypeTypeInfo;
 MCExecEnumTypeInfo *kMCInterfaceSelectionModeTypeInfo = &_kMCInterfaceSelectionModeTypeInfo;
 MCExecCustomTypeInfo *kMCInterfaceStackFileVersionTypeInfo = &_kMCInterfaceStackFileVersionTypeInfo;
+MCExecEnumTypeInfo *kMCInterfaceSystemAppearanceTypeInfo = &_kMCInterfaceSystemAppearanceTypeInfo;
 
 ////////////////////////////////////////////////////////////////////////////////
 
@@ -1701,6 +1717,13 @@ void MCInterfaceSetSelectionMode(MCExecContext& ctxt, intenum_t p_value)
 	MCselectintersect = (Boolean)p_value;
 }
 
+void MCInterfaceGetSystemAppearance(MCExecContext& ctxt, intenum_t& r_value)
+{
+	MCSystemAppearance t_appearance;
+	MCscreen->getsystemappearance(t_appearance);
+	r_value = (intenum_t)t_appearance;
+}
+
 void MCInterfaceGetSelectionHandleColor(MCExecContext& ctxt, MCInterfaceNamedColor& r_color)
 {
 	get_interface_color(MCselectioncolor, MCselectioncolorname, r_color);
diff --git a/engine/src/exec.h b/engine/src/exec.h
index e752fabdc0b..e68c31272cf 100644
--- a/engine/src/exec.h
+++ b/engine/src/exec.h
@@ -2182,6 +2182,7 @@ extern MCExecCustomTypeInfo *kMCInterfaceVisualEffectArgumentTypeInfo;
 extern MCExecCustomTypeInfo *kMCInterfaceButtonIconTypeInfo;
 extern MCExecCustomTypeInfo *kMCInterfaceTriStateTypeInfo;
 extern MCExecCustomTypeInfo *kMCInterfaceStackFileVersionTypeInfo;
+extern MCExecEnumTypeInfo *kMCInterfaceSystemAppearanceTypeInfo;
 
 void MCInterfaceInitialize(MCExecContext& ctxt);
 void MCInterfaceFinalize(MCExecContext& ctxt);
@@ -2645,6 +2646,7 @@ void MCInterfaceGetScreenGamma(MCExecContext& ctxt, double& r_value);
 void MCInterfaceSetScreenGamma(MCExecContext& ctxt, double p_value);
 void MCInterfaceGetSelectionMode(MCExecContext& ctxt, intenum_t& r_value);
 void MCInterfaceSetSelectionMode(MCExecContext& ctxt, intenum_t p_value);
+void MCInterfaceGetSystemAppearance(MCExecContext& ctxt, intenum_t& r_value);
 void MCInterfaceGetSelectionHandleColor(MCExecContext& ctxt, MCInterfaceNamedColor& r_color);
 void MCInterfaceSetSelectionHandleColor(MCExecContext& ctxt, const MCInterfaceNamedColor& p_color);
 void MCInterfaceGetWindowBoundingRect(MCExecContext& ctxt, MCRectangle& r_value);
diff --git a/engine/src/java/com/runrev/android/Engine.java b/engine/src/java/com/runrev/android/Engine.java
index 57c182ce03f..f15a7f37de9 100644
--- a/engine/src/java/com/runrev/android/Engine.java
+++ b/engine/src/java/com/runrev/android/Engine.java
@@ -138,6 +138,8 @@ public class Engine extends View implements EngineApi
 	private boolean m_new_intent;
 
 	private int m_photo_width, m_photo_height;
+	
+	private int m_night_mode;
 
 ////////////////////////////////////////////////////////////////////////////////
 
@@ -239,6 +241,10 @@ public void onScreenOrientationChanged(int orientation)
 
 		m_photo_width = 0;
 		m_photo_height = 0;
+		
+		m_night_mode =
+			p_context.getResources().getConfiguration().uiMode &
+			Configuration.UI_MODE_NIGHT_MASK;
 	}
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -356,6 +362,15 @@ public String loadExternalLibrary(String name)
 
     public void onConfigurationChanged(Configuration p_new_config)
 	{
+		int t_night_mode =
+			getContext().getResources().getConfiguration().uiMode &
+			Configuration.UI_MODE_NIGHT_MASK;
+		
+		if (t_night_mode != m_night_mode)
+		{
+			m_night_mode = t_night_mode;
+			doSystemAppearanceChanged();
+		}
 	}
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -3882,7 +3897,22 @@ public Class getServiceClass()
     {
         return ((LiveCodeActivity)getContext()).getServiceClass();
     }
-    
+	
+	////////////////////////////////////////////////////////////////////////////////
+	
+	public int getSystemAppearance()
+	{
+		switch (m_night_mode)
+		{
+			case Configuration.UI_MODE_NIGHT_YES:
+				return 1;
+			case Configuration.UI_MODE_NIGHT_NO:
+			case Configuration.UI_MODE_NIGHT_UNDEFINED:
+			default:
+				return 0;
+		}
+	}
+	
     ////////////////////////////////////////////////////////////////////////////////
     
     // url launch callback
@@ -3952,6 +3982,7 @@ public static native void doHeadingChanged(double p_heading, double p_magnetic_h
 	public static native void doShake(int action, long timestamp);
 
 	public static native void doOrientationChanged(int orientation);
+	public static native void doSystemAppearanceChanged();
 
 	public static native void doKeyboardShown(int height);
 	public static native void doKeyboardHidden();
diff --git a/engine/src/lextable.cpp b/engine/src/lextable.cpp
index 19b94a3b37a..39af33e9ea5 100644
--- a/engine/src/lextable.cpp
+++ b/engine/src/lextable.cpp
@@ -1690,7 +1690,8 @@ const LT factor_table[] =
         {"syncrate", TT_PROPERTY, P_SYNC_RATE},
         {"syserror", TT_FUNCTION, F_SYS_ERROR},
         {"system", TT_PROPERTY, P_SYSTEM},
-        {"systemcolorselector", TT_PROPERTY, P_SYSTEM_CS},
+		{"systemappearance", TT_PROPERTY, P_SYSTEM_APPEARANCE},
+		{"systemcolorselector", TT_PROPERTY, P_SYSTEM_CS},
         {"systemfileselector", TT_PROPERTY, P_SYSTEM_FS},
 		// IM-2013-12-04: [[ PixelScale ]] The "systemPixelScale" token
 		{"systempixelscale", TT_PROPERTY, P_SYSTEM_PIXEL_SCALE},
diff --git a/engine/src/mac-core.mm b/engine/src/mac-core.mm
index 1fc629e5bbc..7bce664a156 100644
--- a/engine/src/mac-core.mm
+++ b/engine/src/mac-core.mm
@@ -342,12 +342,21 @@ - (void)applicationDidFinishLaunching: (NSNotification *)notification
         
         [t_event release];
     }
+	
+	[[NSDistributedNotificationCenter defaultCenter] addObserver:self
+									 selector:@selector(interfaceThemeChangedNotification:)
+								     name:@"AppleInterfaceThemeChangedNotification" object:nil];
     
 	// We started up successfully, so queue the root runloop invocation
 	// message.
 	[self performSelector: @selector(runMainLoop) withObject: nil afterDelay: 0];
 }
 
+- (void)interfaceThemeChangedNotification:(NSNotification *)notification
+{
+	MCPlatformCallbackSendSystemAppearanceChanged();
+}
+
 - (void)runMainLoop
 {
     for(;;)
@@ -608,7 +617,21 @@ void MCPlatformGetSystemProperty(MCPlatformSystemProperty p_property, MCPlatform
         case kMCPlatformSystemPropertyVolume:
             MCMacPlatformGetGlobalVolume(*(double *)r_value);
             break;
-            
+		
+		case kMCPlatformSystemPropertySystemAppearance:
+		{
+			NSUserDefaults *t_defaults = [NSUserDefaults standardUserDefaults];
+			NSString *t_appearance = [t_defaults stringForKey:@"AppleInterfaceStyle"];
+			if (t_appearance == nil || ![t_appearance isEqualToString:@"Dark"])
+			{
+				*(int16_t *)r_value = kMCPlatformSystemAppearanceLight;
+			}
+			else
+			{
+				*(int16_t *)r_value = kMCPlatformSystemAppearanceDark;
+			}
+		}
+			break;
 		default:
 			assert(false);
 			break;
diff --git a/engine/src/mblandroiddc.cpp b/engine/src/mblandroiddc.cpp
index 85d4c81a540..281b832c929 100644
--- a/engine/src/mblandroiddc.cpp
+++ b/engine/src/mblandroiddc.cpp
@@ -737,6 +737,16 @@ Window MCScreenDC::get_current_window(void)
 
 ////////////////////////////////////////////////////////////////////////////////
 
+void MCScreenDC::getsystemappearance(MCSystemAppearance &r_appearance)
+{
+	int t_system_appearance;
+	MCAndroidEngineRemoteCall("getSystemAppearance", "i", &t_system_appearance);
+	
+	r_appearance = static_cast<MCSystemAppearance>(t_system_appearance);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
 static MCRectangle android_view_get_bounds(void)
 {
 	return MCRectangleMake(s_android_bitmap_loc_x, s_android_bitmap_loc_y, s_android_bitmap_width, s_android_bitmap_height);
@@ -2032,6 +2042,7 @@ extern "C" JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doBackPressed(J
 extern "C" JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doMenuKey(JNIEnv *env, jobject object) __attribute__((visibility("default")));
 extern "C" JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doSearchKey(JNIEnv *env, jobject object) __attribute__((visibility("default")));
 extern "C" JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doOrientationChanged(JNIEnv *env, jobject object, jint orientation) __attribute__((visibility("default")));
+extern "C" JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doSystemAppearanceChanged(JNIEnv *env, jobject object) __attribute__((visibility("default")));
 extern "C" JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doTextDone(JNIEnv *env, jobject object) __attribute__((visibility("default")));
 extern "C" JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doTextCanceled(JNIEnv *env, jobject object) __attribute__((visibility("default")));
 extern "C" JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doMediaDone(JNIEnv *env, jobject object, jstring p_media_content) __attribute__((visibility("default")));
@@ -2375,6 +2386,13 @@ JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doOrientationChanged(JNIEn
 
 //////////
 
+JNIEXPORT void JNICALL Java_com_runrev_android_Engine_doSystemAppearanceChanged(JNIEnv *env, jobject object)
+{
+	MCNotificationPostSystemAppearanceChanged();
+}
+
+//////////
+
 struct MCKeyboardActivatedEvent: public MCCustomEvent
 {
 	MCKeyboardActivatedEvent(float p_height)
diff --git a/engine/src/mbldc.h b/engine/src/mbldc.h
index 0a298e225e7..c6d81aa9e70 100644
--- a/engine/src/mbldc.h
+++ b/engine/src/mbldc.h
@@ -245,6 +245,8 @@ class MCScreenDC: public MCUIDC
 	Window get_current_window(void);
 	
     void refresh_current_window(void);
+	
+	void getsystemappearance(MCSystemAppearance &r_appearance);
 private:
 	// The top-left of the mobile 'window' in screen co-ordinates.
 	int32_t m_window_left;
diff --git a/engine/src/mbliphoneapp.mm b/engine/src/mbliphoneapp.mm
index bcfe90d967a..d5f0aa71d4e 100644
--- a/engine/src/mbliphoneapp.mm
+++ b/engine/src/mbliphoneapp.mm
@@ -1973,6 +1973,11 @@ - (void)voiceOverStatusChanged
     }
 }
 
+- (void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection
+{
+	MCNotificationPostSystemAppearanceChanged();
+}
+
 @end
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/engine/src/mbliphonedc.mm b/engine/src/mbliphonedc.mm
index 8c4f74b90c5..50729f4b935 100644
--- a/engine/src/mbliphonedc.mm
+++ b/engine/src/mbliphonedc.mm
@@ -857,6 +857,22 @@ static void MCScreenDCDoSnapshot(void *p_env)
 
 ////////////////////////////////////////////////////////////////////////////////
 
+void MCScreenDC::getsystemappearance(MCSystemAppearance &r_appearance)
+{
+	UITraitCollection *t_traits = [MCIPhoneGetRootView() traitCollection];
+	if ([t_traits respondsToSelector: @selector(userInterfaceStyle)] &&
+		[t_traits userInterfaceStyle] == 2 /* UIUserInterfaceStyleDark */)
+	{
+		r_appearance = kMCSystemAppearanceDark;
+	}
+	else
+	{
+		r_appearance = kMCSystemAppearanceLight;
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
 extern void *coretext_font_create_with_name_size_and_style(MCStringRef p_name, uint32_t p_size, bool p_bold, bool p_italic);
 extern bool coretext_font_destroy(void *p_font);
 extern bool coretext_font_get_metrics(void *p_font, float& r_ascent, float& r_descent, float& r_leading, float& r_xheight);
diff --git a/engine/src/mblnotification.cpp b/engine/src/mblnotification.cpp
index a59703d5bd8..53c36beb755 100644
--- a/engine/src/mblnotification.cpp
+++ b/engine/src/mblnotification.cpp
@@ -180,4 +180,9 @@ void MCNotificationPostLaunchDataChanged()
 	/* UNCHECKED */ MCNotificationPostCustom(MCM_launch_data_changed, 0);
 }
 
+void MCNotificationPostSystemAppearanceChanged()
+{
+	/* UNCHECKED */ MCNotificationPostCustom(MCM_system_appearance_changed, 0);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/engine/src/mblnotification.h b/engine/src/mblnotification.h
index b9b833da72c..5dec994dea6 100644
--- a/engine/src/mblnotification.h
+++ b/engine/src/mblnotification.h
@@ -25,6 +25,7 @@ void MCNotificationPostPushRegistered (MCStringRef p_registration_text);
 void MCNotificationPostPushRegistrationError (MCStringRef p_error_text);
 void MCNotificationPostUrlWakeUp (MCStringRef p_url_wake_up_text);
 void MCNotificationPostLaunchDataChanged();
+void MCNotificationPostSystemAppearanceChanged();
 bool MCNotificationPostCustom(MCNameRef p_message, uint32_t p_param_count, ...);
 
 #endif
diff --git a/engine/src/mcstring.cpp b/engine/src/mcstring.cpp
index 2455369c622..d1e9a16e245 100644
--- a/engine/src/mcstring.cpp
+++ b/engine/src/mcstring.cpp
@@ -632,6 +632,8 @@ MCNameRef MCN_font_message;
 MCNameRef MCN_font_tooltip;
 MCNameRef MCN_font_system;
 
+MCNameRef MCM_system_appearance_changed;
+
 const struct { const char *cstring; MCNameRef *name_var; } kInitialNames[] =
 {
 	{ "msg", &MCN_msg },
@@ -958,6 +960,7 @@ const struct { const char *cstring; MCNameRef *name_var; } kInitialNames[] =
 	{ "unloadURL", &MCM_unload_url },
 	{ "updateScreen", &MCM_update_screen },
 	{ "updateVariable", &MCM_update_var },
+	{ "systemAppearanceChanged", &MCM_system_appearance_changed },
 
 #ifdef FEATURE_PLATFORM_URL
 	{ "urlProgress", &MCM_url_progress },
diff --git a/engine/src/mcstring.h b/engine/src/mcstring.h
index cc3debf1a99..9dbeff6fb90 100644
--- a/engine/src/mcstring.h
+++ b/engine/src/mcstring.h
@@ -635,3 +635,5 @@ extern MCNameRef MCN_font_content;          // Control contents
 extern MCNameRef MCN_font_message;          // Message boxes and status messages
 extern MCNameRef MCN_font_tooltip;          // Tooltip text
 extern MCNameRef MCN_font_system;           // Anything else not covered above
+
+extern MCNameRef MCM_system_appearance_changed;
diff --git a/engine/src/parsedef.h b/engine/src/parsedef.h
index d360752dff2..480e706428c 100644
--- a/engine/src/parsedef.h
+++ b/engine/src/parsedef.h
@@ -1758,6 +1758,8 @@ enum Properties {
     P_REV_LIBRARY_MAPPING,
     
     P_LAYER_CLIP_RECT,
+	
+	P_SYSTEM_APPEARANCE,
     
     __P_LAST,
 };
diff --git a/engine/src/platform-internal.h b/engine/src/platform-internal.h
index a9338ace69c..ccd19e9e726 100644
--- a/engine/src/platform-internal.h
+++ b/engine/src/platform-internal.h
@@ -325,6 +325,7 @@ void MCPlatformCallbackSendApplicationSuspend(void);
 void MCPlatformCallbackSendApplicationResume(void);
 
 void MCPlatformCallbackSendScreenParametersChanged(void);
+void MCPlatformCallbackSendSystemAppearanceChanged(void);
 
 void MCPlatformCallbackSendWindowCloseRequest(MCPlatformWindowRef window);
 void MCPlatformCallbackSendWindowClose(MCPlatformWindowRef window);
diff --git a/engine/src/platform.cpp b/engine/src/platform.cpp
index ab7a81f2468..a170154107c 100644
--- a/engine/src/platform.cpp
+++ b/engine/src/platform.cpp
@@ -29,6 +29,7 @@ void MCPlatformHandleApplicationResume(void);
 void MCPlatformHandleApplicationRun(bool& r_continue);
 
 void MCPlatformHandleScreenParametersChanged(void);
+void MCPlatformHandleSystemAppearanceChanged(void);
 
 void MCPlatformHandleWindowCloseRequest(MCPlatformWindowRef window);
 void MCPlatformHandleWindowClose(MCPlatformWindowRef window);
@@ -129,6 +130,13 @@ void MCPlatformCallbackSendScreenParametersChanged(void)
 
 //////////
 
+void MCPlatformCallbackSendSystemAppearanceChanged(void)
+{
+	MCPlatformHandleSystemAppearanceChanged();
+}
+
+//////////
+
 #if defined(FEATURE_PLATFORM_WINDOW)
 
 void MCPlatformCallbackSendWindowCloseRequest(MCPlatformWindowRef p_window)
diff --git a/engine/src/platform.h b/engine/src/platform.h
index a9406a97173..cd8a631b76a 100644
--- a/engine/src/platform.h
+++ b/engine/src/platform.h
@@ -487,11 +487,19 @@ enum MCPlatformSystemProperty
 	kMCPlatformSystemPropertyCursorImageSupport,
     
     kMCPlatformSystemPropertyVolume,
+
+	kMCPlatformSystemPropertySystemAppearance,
 };
 
 void MCPlatformGetSystemProperty(MCPlatformSystemProperty property, MCPlatformPropertyType type, void *value);
 void MCPlatformSetSystemProperty(MCPlatformSystemProperty property, MCPlatformPropertyType type, void *value);
 
+enum MCPlatformSystemAppearance
+{
+	kMCPlatformSystemAppearanceLight = 0,
+	kMCPlatformSystemAppearanceDark = 1,
+};
+
 ////////////////////////////////////////////////////////////////////////////////
 
 typedef bool (*MCPlatformPreWaitForEventCallback)(double duration, bool blocking);
diff --git a/engine/src/property.cpp b/engine/src/property.cpp
index bd61a6b7776..d0eeb694a38 100644
--- a/engine/src/property.cpp
+++ b/engine/src/property.cpp
@@ -403,6 +403,8 @@ static MCPropertyInfo kMCPropertyInfoTable[] =
     
     // MW-2014-12-10: [[ Extensions ]] Returns a list of loaded extensions.
     DEFINE_RO_PROPERTY(P_LOADED_EXTENSIONS, ProperLinesOfString, Engine, LoadedExtensions)
+	
+	DEFINE_RO_ENUM_PROPERTY(P_SYSTEM_APPEARANCE, InterfaceSystemAppearance, Interface, SystemAppearance)
 };
 
 static bool MCPropertyInfoTableLookup(Properties p_which, Boolean p_effective, const MCPropertyInfo*& r_info, bool p_is_array_prop)
@@ -940,6 +942,7 @@ Parse_stat MCProperty::parse(MCScriptPoint &sp, Boolean the)
             
     // MW-2014-12-10: [[ Extensions ]] Add support for global loadedExtensions property.
     case P_LOADED_EXTENSIONS:
+	case P_SYSTEM_APPEARANCE:
         break;
     
     case P_REV_LIBRARY_MAPPING:
diff --git a/engine/src/uidc.cpp b/engine/src/uidc.cpp
index dfdb44e6031..2e004601839 100644
--- a/engine/src/uidc.cpp
+++ b/engine/src/uidc.cpp
@@ -2039,3 +2039,11 @@ void MCUIDC::modalLoopEnd()
     m_modal_loops = m_modal_loops->chain;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+
+void MCUIDC::getsystemappearance(MCSystemAppearance &r_appearance)
+{
+	r_appearance = kMCSystemAppearanceLight;
+}
+
+////////////////////////////////////////////////////////////////////////////////
diff --git a/engine/src/uidc.h b/engine/src/uidc.h
index 5844e7b5dd8..9f98e7abbde 100644
--- a/engine/src/uidc.h
+++ b/engine/src/uidc.h
@@ -323,6 +323,12 @@ enum MCPlatformFeature
 	PLATFORM_FEATURE_TRANSIENT_SELECTION
 };
 
+enum MCSystemAppearance
+{
+	kMCSystemAppearanceLight = 0,
+	kMCSystemAppearanceDark = 1,
+};
+
 class MCUIDC
 {
 public:
@@ -654,6 +660,8 @@ class MCUIDC
     // MW-2014-04-26: [[ Bug 5545 ]] Hides the cursor until the mouse moves on platforms which
     //   require this action.
     virtual void hidecursoruntilmousemoves(void);
+	
+	virtual void getsystemappearance(MCSystemAppearance &r_appearance);
     
     //
 
diff --git a/ide-support/revsaveasandroidstandalone.livecodescript b/ide-support/revsaveasandroidstandalone.livecodescript
index cbc6f008a2e..ef45e76c02c 100644
--- a/ide-support/revsaveasandroidstandalone.livecodescript
+++ b/ide-support/revsaveasandroidstandalone.livecodescript
@@ -587,8 +587,7 @@ private command revSaveAsMobileStandaloneMain pStack, pApkFile, pTarget, pSettin
       // SN-2015-09-24: [[ Bug 15875 ]] Add the screenSize configChanges value for API > 12
       //  Otherwise the app restarts on orientation change.
       local tConfigChangesProp
-      put "keyboardHidden|orientation" into tConfigChangesProp
-      put "|screenSize" after tConfigChangesProp
+      put "keyboardHidden|orientation|uiMode|screenSize" into tConfigChangesProp
       replace "${CONFIG_CHANGES}" with tConfigChangesProp in tManifest
       
       // SN-2015-09-30: [[ Bug 10267 ]] Hardware Acceleration option added