colorfast

形容词 colorfast:

1. having color that is resistant to fading or running

col.or.fast

adj.（形容词）
Having color that will not run or fade with washing or wear:
不褪色的：不会因清洗或磨损而褪色的：
例句：
a colorfast fabric.
一块不褪色的面料

【引伸】
col.orfast.ness
n.（名词）