Can you change the Simple button colors only in the DevExpress WPF Theme Designer? Every time I try it changes the grid also. I just want to change the colors for the simple button. I am trying to control it from the theme only. The issue I see is the button always looks like the background of the form.
I've recorded short screencasts illustrating how you can change SimpleButton's background both in the Classic and Color themes by using the Theme Designer (see the Office2016White.mp4 and Office2016WhiteSE.mp4 files respectively). Try the same approach on your side and check if this helps.
If not, I'd appreciate it if you specify the theme that you used as a basic theme and record a short video illustrating your steps.