If you are using Android Lollipop (api 21+), you can edit the "styles21.xml" (in the res directory) code and add the following:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppTheme" parent="android:Theme.Material">
<!-- Customize your theme using Material Design here. -->
<!-- Title Bar color here -->
<item name="android:colorPrimary">#YOUR_COLOR_HERE</item>
<!-- Background color here -->
<item name="android:windowBackground">#YOUR_COLOR_HERE</item>
</style>
</resources>
For more information see Google's "Using the Material Theme" here.
This XML code will work throughout the whole app (each different view) unless otherwise specified.
I hope this is what you are looking for!