color-setter
nounUK /ˈkʌləˌsɛtə/
US /ˈkʌlərˌsɛtər/
A color-setter is a person or thing that fixes colors so they stay the same.
The color-setter made sure the red paint did not fade in the sun.
OTHER MEANINGS
2. A substance used in printing to keep ink colors from running.
The printer added a color-setter to the ink before the job.
3. A device that sets the colors on a screen or display.
The color-setter on the monitor keeps the picture looking natural.
4. A worker who prepares colors for painting or dyeing.
The color-setter mixed the dyes before the cloth was dipped.