Honestly, I've had the light green after taking a vitamin supplement that I did not need. You can get red by drinking a lot of beet juice (the juice in the jar of sliced beets), but if you haven't done that red is very bad.
When I was in high school there was a kid who died of spinal meningitis. The school district distributed preventive medicine to all students. It turned my pee super orange. And from what I heard it turned guys' pee red!
If my pee is lager-colored I know I'm not drinking enough (unless it's first thing in the morning). Pee should be mostly clear with only a slight yellow tinge!
I found out about that in college. Initially I thought it was some cleaning compound in the dorm toilets. I found out later that someone had put methylene blue in brownies they brought to a gathering as a prank.
It wasn't that great of a prank because it relies on people talking about the color of their urine well after the prank was done.
This handy chart is from the Aussie government. Other colours are possible, but have specific causes that most likely require medical attention. There are other things that were already mentioned in other comments that could cause weird colours.
One of the greens just means you’re in New Orleans and have had too many hand grenades.
Actually, several of those right colors just mean your near bourbon street