makes the default colors easily exchangable

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

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!--   color for the app bar and other primary UI elements -->
+    <color name="colorPrimary">#ff7e5f</color>
+
+    <!--   a darker variant of the primary color, used for
+           the status bar (on Android 5.0+) and contextual app bars -->
+    <color name="colorPrimaryDark">#c74e34</color>
+
+    <!--   a secondary color for controls like checkboxes and text fields -->
+    <color name="colorAccent">#351c4d</color>
+</resources>
\ No newline at end of file

android/app/src/main/res/values/styles.xml

@@ -3,6 +3,7 @@
     <!-- Base application theme. -->
     <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
         <!-- Customize your theme here. -->
+        <item name="colorAccent">@color/colorAccent</item>
     </style>
 
 </resources>