color changes to use a darker theme

app/src/main/java/ovh/smayzy/i2d_project_15_app/MainActivity.kt

@@ -191,7 +191,7 @@ class MainActivity : AppCompatActivity() {
             xAxis.apply {
                 position = XAxis.XAxisPosition.BOTTOM
                 valueFormatter = object : ValueFormatter() {
-                    override fun getFormattedValue(value: Float): String? {
+                    override fun getFormattedValue(value: Float): String {
                         return "${value.toInt()}s"
                     }
                 }

app/src/main/res/layout/activity_main.xml

@@ -66,7 +66,7 @@
         android:layout_marginTop="16dp"
         android:layout_marginEnd="16dp"
         android:layout_marginBottom="8dp"
-        android:background="@android:color/white"
+        android:background="@color/colorBackground"
         app:layout_constraintTop_toBottomOf="@id/temp_circle"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
@@ -80,7 +80,7 @@
         android:layout_marginTop="8dp"
         android:layout_marginEnd="16dp"
         android:layout_marginBottom="16dp"
-        android:background="@android:color/white"
+        android:background="@color/colorBackground"
         app:layout_constraintTop_toBottomOf="@id/temp_chart"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintEnd_toEndOf="parent"

app/src/main/res/values/colors.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="colorPrimary_light">#00246B</color>
-    <color name="colorPrimary_dark">#CADCFC</color>
-    <color name="colorAccent">#97BAF8</color>
-    <color name="colorBackground">#97BAF8</color>
+    <color name="colorPrimary_light">#3D2F71</color>
+    <color name="colorPrimary_dark">#141118</color>
+    <color name="colorAccent">#343434</color>
+    <color name="colorBackground">#141118</color>
 </resources>