I chose the black one. But you should seriously consider the Stripe stainless steel cock ring for the elegance and the price. Make sure you measure accurately for the right size.
I like red, but my hubby is red/green color blind so he can't see the shades of red so when I bought it I bought the black. Of course we didn't measure to see if it would actually fit before hand so we had to return it, but you live and learn.