Tab Group button color

How do I change the color for the selected tab button?

Use a conditional…

I am trying this first time, Can you give an example?

It depends on your app obviously, but something like when 'this tab is selected' background colour = Red

For ‘this tab is selected’ you’ll need to define whatever condition you’re using do determine the selected tab - presumably a custom state value somewhere, which you’ll need to set anytime the tab is selected.