Here is the full code fragment for text colours.
Code:
<TextColor>
<R>255</R>
<G>255</G>
<B>255</B>
</TextColor>
<UseCustomMouseoverColor>true</UseCustomMouseoverColor>
<MouseoverColor>
<R>0</R>
<G>0</G>
<B>255</B>
</MouseoverColor>
<UseCustomPressedColor>true</UseCustomPressedColor>
<PressedColor>
<R>0</R>
<G>255</G>
<B>0</B>
</PressedColor>
<UseCustomDisabledColor>true</UseCustomDisabledColor>
<DisabledColor>
<R>192</R>
<G>192</G>
<B>192</B>
</DisabledColor>