colorfast
/ˈkʌlərˌfæst/
adjective
- Describing a fabric or material that does not lose its color when washed or exposed to light.
- This shirt is colorfast, so you can wash it with whites without worry.
- She bought colorfast towels to keep them looking bright after many washes.
- The label says the rug is colorfast, meaning it won't fade in sunlight.