color palette

<!-- extend one of the Theme.AppCompat themes -->
<style name="Theme.MyTheme" parent="Theme.AppCompat.Light">
    <!-- customize the color palette -->
    <item name="colorPrimary">@color/material_blue_500</item>
    <item name="colorPrimaryDark">@color/material_blue_700</item>
    <item name="colorAccent">@color/material_green_A200</item>
</style>