One thing I've learned is that I have no idea what people want. More specifically, I have no idea what colours they'll want things printed in.
Enter Makeably, a site for hand-made custom-made things.
It simplifies the whole custom-making process: instead of endless emails back and forth, buyers can see at a glance which aspects of a product are customisable, what the options are, and what the price range is.
I've only created one template so far; it's quite a learning curve, describing products in this way, after years of trying to write product descriptions that limit the options (and hopefully the confusion).
So: ribbon in any colour you could possibly want. Let's get going!