No, you can't get color with copper. I'm quoting part of the copper membership page:
Allows you to post images even if you are a newbie, reduces the time-between-actions limit, and provides some of the same benefits as being of natural Member rank.
The benefits of being a natural member rank is those you have right now. Nothing more, nothing less. Just donation. This place has some strict rules about avatars and signatures and that's because they can be used on advertising.