Which of these colors isn't a shade of red?
carmine
amaranth
indigo
vermilion
Indigo is a deep and rich color close to the color wheel blue (a primary color in the RGB color space), as well as to some variants of ultramarine. It is traditionally regarded as a color in the visible spectrum, as well as one of the seven colors of the rainbow: the color between blue and violet.
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Answers by country
carmine
amaranth
indigo
vermilion
answers
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