[Jaybird]

I agree about red fading first. I know this is anecdotal but whenever I've found an old beer can or other piece of packaging out in the woods while hiking, I can always read the lettering but the color is gone. Pabst beer cans, etc. So obviously different colors fade at different rates.

Talk to a tattoo artist and they will tell you about pigments as well and which colors fade the most (red) and are subject to the suns effects. Black and blue and purple are some of the more steadfast colors.


edited to add: Just read the article linked by Iggyman and it basically says the same thing. Living out in Southern California, you can see it in a red car of the same age as a blue car as well. Much more faded. again, anecdotal but backed by science.