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of a color at the end of the spectrum next to orange and opposite violet, as of blood, fire, or rubies.

of the color between green and orange in the spectrum, a primary subtractive color complementary to blue; colored like ripe lemons or egg yolks.

of a color intermediate between green and violet, as of the sky or sea on a sunny day.

a tropical plant of the pea family, which was formerly widely cultivated as a source of dark blue dye. the dark blue dye obtained from the indigo plant.