Answer: roygbiv

AnswerCrossword Clue
ROYGBIV

Spectral mnenomic

ROYGBIV

Colorful mnemonic

ROYGBIV

"Name" used as a spectrum mnemonic

ROYGBIV
Shady fellow?
ROYGBIV
Person of color?
ROYGBIVRainbow mnemonic
ROYGBIVColorful guy?