<style name="AppTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="android:textColor">#yourcolor</item>
<item name="android:buttonStyle">@style/ButtonColor</item>
<item name="colorButtonNormal">@color/buttonColor</item>
</style>
<style name="ButtonColor" parent="@android:style/Widget.Button">
<item name="android:textColor">@color/yourcolor</item>
</style>
android:textColor This should help you change the text color globally.