A skin can "look similar" to another skin and not be an issue. It has happened countless times here on WC over the years. Example: I was once "sorta accused" of copying (stealing an idea) for a cursor that looked a lot like one just released by a master skinner here. Wiz knew, and had been using a cursor of mine for weeks that I just hadn't released yet. Mine was made before the one I supposedly copied.
You can't copyright colors.
Point is, guys, that people see a skin they like, they get inspired by it. Decide they want a skin of similar color scheme, so they make theirs. This IS NOT copying/copyright infringement. People see a nice Jaguar, and then they decide to make their own wallpaper with the car image on it, not copying.
Let's be big boys and not take this where it doesn't need to go, eh?