色

tasteless, odorless and colorless

erotic or pornographic literature (Edo period)

Y-chromosome haplogroup

'taru' adjective

dusky; somber light of a gathering dusk

Astronomy

black dwarf

Mathematics

four-color theorem; four-color map theorem

blue light-emitting diode; blue LED

dye works

Astronomy

blue giant (star)

(a woman of) unparalleled beauty; (a woman's beauty being) matchless throughout the land

white return; white-paper income-tax return; type of income tax return filing which does not require maintaining accounting books

additive mixture of colors; additive mixture of colours

Genetics

chromosome map

Physics

quantum chromodynamics

iridescence; play of color; opalescence

Photography

dye sensitizing

russet

Mahjong

triple pung; winning hand containing the same pung in each of the three suits

fledgling; young and inexperienced; green; wet behind the ears

Y-chromosomal Adam

Slang

buying more than one of the same item in different colors (colours)

Proverb

handsome men have neither money nor power

red terror

brown hornet (Vespa dybowskii)