Answer: indigos

AnswerCrossword Clue
INDIGOSSpectrum colors
INDIGOSBlue hues
INDIGOSBlue dyes
INDIGOSBlue dyes.
INDIGOSShades of blue
INDIGOSPlants that yield a blue dye
indigosdeep blue color or dye
indigosINDIGO, a blue dye