diff --git a/app/src/main/java/com/infomaniak/swisstransfer/ui/screen/main/MainScaffold.kt b/app/src/main/java/com/infomaniak/swisstransfer/ui/screen/main/MainScaffold.kt
index 052329b28..cd13f19d0 100644
--- a/app/src/main/java/com/infomaniak/swisstransfer/ui/screen/main/MainScaffold.kt
+++ b/app/src/main/java/com/infomaniak/swisstransfer/ui/screen/main/MainScaffold.kt
@@ -40,6 +40,7 @@ import com.infomaniak.swisstransfer.ui.navigation.MainNavigation
 import com.infomaniak.swisstransfer.ui.navigation.NavigationItem
 import com.infomaniak.swisstransfer.ui.theme.SwissTransferTheme
 import com.infomaniak.swisstransfer.ui.utils.PreviewMobile
+import com.infomaniak.swisstransfer.ui.utils.PreviewTablet
 
 @Composable
 fun MainScaffold(
@@ -65,25 +66,15 @@ fun MainScaffold(
         }
     }
 
-    MainScaffold(navType, currentDestination, navController, content)
+    MainScaffold(navType, currentDestination, navController::navigateToSelectedItem, content)
 }
 
 @Composable
 private fun MainScaffold(
     navType: NavigationSuiteType,
-    currentDestination: MainNavigation,
-    navController: NavHostController,
-    content: @Composable () -> Unit,
-) {
-    Navigation(currentDestination, navController::navigateToSelectedItem, navType, content)
-}
-
-@Composable
-private fun Navigation(
     currentDestination: MainNavigation,
     navigateToSelectedItem: (MainNavigation) -> Unit,
-    navType: NavigationSuiteType,
-    content: @Composable () -> Unit
+    content: @Composable () -> Unit,
 ) {
     val isNavigationBar = navType == NavigationSuiteType.NavigationBar
 
@@ -148,9 +139,9 @@ private fun NavHostController.navigateToSelectedItem(destination: MainNavigation
 
 @PreviewMobile
 @Composable
-private fun NavigationPreview() {
+private fun NavigationPreviewMobile() {
     SwissTransferTheme {
-        Navigation(
+        MainScaffold(
             currentDestination = MainNavigation.SentDestination,
             navigateToSelectedItem = {},
             navType = NavigationSuiteType.NavigationBar,
@@ -158,3 +149,16 @@ private fun NavigationPreview() {
         )
     }
 }
+
+@PreviewTablet
+@Composable
+private fun NavigationPreviewTablet() {
+    SwissTransferTheme {
+        MainScaffold(
+            currentDestination = MainNavigation.SentDestination,
+            navigateToSelectedItem = {},
+            navType = NavigationSuiteType.NavigationRail,
+            content = {},
+        )
+    }
+}
diff --git a/app/src/main/java/com/infomaniak/swisstransfer/ui/theme/ColorLight.kt b/app/src/main/java/com/infomaniak/swisstransfer/ui/theme/ColorLight.kt
index 0d5d1c2c9..8ff5e90cf 100644
--- a/app/src/main/java/com/infomaniak/swisstransfer/ui/theme/ColorLight.kt
+++ b/app/src/main/java/com/infomaniak/swisstransfer/ui/theme/ColorLight.kt
@@ -62,11 +62,3 @@ val LightColors = CustomColors(
     navigationItemBackground = light_background,
     divider = Color(mouse),
 )
-
-@Immutable
-data class CustomColors(
-    val primaryTextColor: Color,
-    val secondaryTextColor: Color,
-    val navigationItemBackground: Color,
-    val divider: Color,
-)
diff --git a/app/src/main/java/com/infomaniak/swisstransfer/ui/theme/Theme.kt b/app/src/main/java/com/infomaniak/swisstransfer/ui/theme/Theme.kt
index dfb03c6fa..8f67d0198 100644
--- a/app/src/main/java/com/infomaniak/swisstransfer/ui/theme/Theme.kt
+++ b/app/src/main/java/com/infomaniak/swisstransfer/ui/theme/Theme.kt
@@ -19,14 +19,9 @@
 package com.infomaniak.swisstransfer.ui.theme
 
 import androidx.compose.foundation.isSystemInDarkTheme
-import androidx.compose.material3.LocalTextStyle
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.darkColorScheme
-import androidx.compose.material3.lightColorScheme
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.CompositionLocalProvider
-import androidx.compose.runtime.ProvidableCompositionLocal
-import androidx.compose.runtime.staticCompositionLocalOf
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.graphics.Color
 
 private val DarkColorScheme = darkColorScheme(
     primary = dark_primary,
@@ -57,7 +52,7 @@ private val LightColorScheme = lightColorScheme(
 )
 
 val LocalCustomTypography = staticCompositionLocalOf { Typography }
-val LocalCustomColors: ProvidableCompositionLocal<CustomColors?> = staticCompositionLocalOf { null }
+val LocalCustomColors: ProvidableCompositionLocal<CustomColors> = staticCompositionLocalOf { CustomColors() }
 
 @Composable
 fun SwissTransferTheme(
@@ -84,5 +79,16 @@ object SwissTransferTheme {
         get() = LocalCustomTypography.current
     val colors: CustomColors
         @Composable
-        get() = LocalCustomColors.current ?: error("Cannot access uninitialized LocalCustomColors")
+        get() = LocalCustomColors.current
+    val materialColors: ColorScheme
+        @Composable
+        get() = MaterialTheme.colorScheme
 }
+
+@Immutable
+data class CustomColors(
+    val primaryTextColor: Color = Color.Unspecified,
+    val secondaryTextColor: Color = Color.Unspecified,
+    val navigationItemBackground: Color = Color.Unspecified,
+    val divider: Color = Color.Unspecified,
+)