do what vbstyles/themeincs does add text comments in images file :) its hard to remove those and if you see pirated website download the png and it would have who pirated the skin's watermark
it looks nothing element using same colors but making a whole diff thing is not stealing I.P imho in the future even making a custom skin will lead people suing each other for using same colors even 1 color will make people think this skin will be stealing intellectual property 0o which is crazy