如何在选择器中设置按钮的文本样式？

Button selectors allows to define a background for each state of the button, but how can the button's text style be defined for each state? My objective is to grey out a button when disabled. So I set a greyed out background to the disable state of the button, but the only way I found to also grey out the text is to change it's color dynamically when I disable the button...Button selectors allows to define a background