Issue with bright buttons

Hi,

I have an issue when trying to comply to a brand guideline where the background is dark and the buttons are bright or white; Rise doesn't seem to let me select text color in buttons. 

Is there a workaround within the system?

Surely it can't be intended for users to be able to make white buttons with only invisible text?

I'm not looking to edit CSS each time i republish the SCORM to update something, because other colleagues are expected to be able to make minor updates without having to learn CSS or do the extra work each time.

I also noticed that line dividers are always dark, even if the highlight color is changed to a lighter color. And the number dividers have white numbers no matter what - so they become invisible just like the continue button.

Attached picture shows a button, a divider line (which you can't see), and a number divider.