How do you change the font color of the data table headers?

[#1]

I can't for the life of me figure out how the change the color of the font on the data table headers. 

I had to change the background color to white in order to get the tan border off of my graphs, but the text color was already set to white before I did that. This means the headers of my tables look like this because it's white-on-white and I can't see anything unless I am actively clicking on them:  

How do you change the font color of the headers? 

I went Preferences > Styles, but don't see any place to change the font color. 

[#2]

Are you using an OS with dark mode? I'm not sure how the text would get set to white. I also set the background to white and the text remains black. JMP version and OS (mac/win) will help.

[#3]

Just saw the MAC label, on the far right of the screen. We need someone more familiar with JMP on Mac to take a look.