User interface (how to change background).
How i may change background for window?
I have a Button, set *Style* "**Round rect**", set *Type* "**On Off**", set *State* "**On**"-how i may change background color from gray to blue?
And how i may change background for all app?

Thanks!!!
User interface (how to change background).
===

How i may change background for window?
I have a Button, set *Style* "**Round rect**", set *Type* "**On Off**", set *State* "**On**"-how i may change background color from gray to blue?
And how i may change background for all app?

Thanks!!!