Multiple button font color

Are you able to have two different font colors on buttons?

Based off the documentation and settings it looks like you can however I cant figure out how to implement it.
I see the below in documentation:
$button-color-alt Color $medium-gray Text color of buttons with a light background.

However i cant figure out how to use the color i set on that variable as it’s will only use the

"$button-color: $white;"

I’ve attached images of the two different button colors that i need with the two different fonts. It’s easy to change the backgrounds however i need to change the font color the the attached images. The pink one is complete, I just need the $button-color-alt variable set on the grey button.
Screen Shot 2021-03-30 at 11.19.43 PM

Screen Shot 2021-03-30 at 11.19.32 PM

this is the button that i’ve made no problem. I had to post this on another post as the system only allowed me to post one image