Add additional color options

[stevenmhunt]

I have started the project with the basic "gold", "silver", and "bronze" options which are what I think about regarding badges and medals. Are there any more colors which would be useful to add? If so, I currently have to make adjustments per size per color because I configure the border for each size. There is probably a better way to do it. If that can get cleaned up, we can add more colors easily.