Enable materialYou theme usage.

app/src/main/java/me/zobrist/tichucounter/ui/Theme.kt

@@ -78,11 +78,16 @@ fun AppTheme(
   useDarkTheme: Boolean = isSystemInDarkTheme(),
   content: @Composable() () -> Unit
 ) {
-  val colors = if (!useDarkTheme) {
-    LightColors
-  } else {
-    DarkColors
-  }
+
+  val dynamicColor = Build.VERSION.SDK_INT >= Build.VERSION_CODES.S
+
+  val colors = when {
+        dynamicColor && useDarkTheme - > dynamicDarkColorScheme(LocalContext.current)
+        dynamicColor && !useDarkTheme - > dynamicLightColorScheme(LocalContext.current)
+        darkTheme - > DarkColors
+        else - > LightColors
+      }
+
 
   MaterialTheme(
     colorScheme = colors,