Hi @MayaD,
How do you change the Fill color of the Button within your app?
Have you solved your problem?
I have made a test on my side, please take a try with the following workaround:
Set the OnSelect property of the Button control to following:
Set(IsClicked,!IsClicked)
Set the Fill property of the Button control to following:
If(IsClicked,RGBA( 255, 20, 147, 1 ),RGBA(56, 96, 178, 1))
Please take a try with above solution, check if your issue is solved.
Best regards,
Kris