Fix theming dark/light

libraries/designsystem/src/main/java/io/element/android/x/designsystem/Color.kt

@@ -2,12 +2,5 @@ package io.element.android.x.designsystem
 
 import androidx.compose.ui.graphics.Color
 
-val Purple80 = Color(0xFFD0BCFF)
-val PurpleGrey80 = Color(0xFFCCC2DC)
-val Pink80 = Color(0xFFEFB8C8)
-
-val Purple40 = Color(0xFF6650a4)
-val PurpleGrey40 = Color(0xFF625b71)
-val Pink40 = Color(0xFF7D5260)
-
 val LightGrey = Color(0x993C3C43)
+val DarkGrey = Color(0x99EBEBF5)

libraries/designsystem/src/main/java/io/element/android/x/designsystem/Theme.kt

@@ -6,21 +6,30 @@ import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.material3.*
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalView
 import androidx.core.view.WindowCompat
 
 private val DarkColorScheme = darkColorScheme(
-    primary = Purple80,
-    secondary = PurpleGrey80,
-    tertiary = Pink80
+    primary = Color.White,
+    secondary = DarkGrey,
+    tertiary = Color.White,
+    background = Color.Black,
+    onBackground = Color.White,
+    surface = Color.Black,
+    onSurface = Color.White
 )
 
 private val LightColorScheme = lightColorScheme(
-    primary = Purple40,
-    secondary = PurpleGrey40,
-    tertiary = Pink40
+    primary = Color.Black,
+    secondary = LightGrey,
+    tertiary = Color.Black,
+    background = Color.White,
+    onBackground = Color.Black,
+    surface = Color.White,
+    onSurface = Color.Black
 
     /* Other default colors to override
     background = Color(0xFFFFFBFE),
@@ -33,6 +42,7 @@ private val LightColorScheme = lightColorScheme(
     */
 )
 
+
 @Composable
 fun ElementXTheme(
     darkTheme: Boolean = isSystemInDarkTheme(),