- Green is for the money you spend on liquid refreshments and revelry.
- Gold is for the color of the beer you drink.
- Purple is for the unexplained bruises on your body when you wake up the next morning on the sidewalk.
There. That's it! We're always happy to help, so feel free to add more questions in the comments below.
* - We didn't actually look this up, so it's more of a guess than "what we found out".