I suggest that the theme allows us to edit the color of the text on the buttons in addition to the color of the button itself.

Take the following image:

The text is extremely hard to read, but would be extremely simple to do so if I was able to alter the white text to a darker color.

Thanks for the suggestion, I'll make a note for future update. The color of the button should be legible by comparing the brightness component of the button color but I guess the algorithm is off for this case.