Question [Q] Change Text Color in Buttons

I am currently theming 'framework-res.apk', and I can't seem to change the text color in buttons (holo light) from black to white, though I have successfully changed them in action bars. I have tried several attempts like creating .xml files and linking them with 'Widget.Holo.Light.Button' from styles.xml (I am trying to change the text color in holo light theme), but no luck (holo light themed apps keep force closing). Can you guys help me with that? Thanks a lot! By the way, I am using Android 4.2.2.