from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Having color that will not run or fade with washing or wear: a colorfast fabric.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having colors that have been dyed or applied to the material in a way that will prevent them from being washed out, running, or fading.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. having color that is resistant to fading or running
color + -fast (Wiktionary)