But what color is indigo? Turns out, that's a big question. A mix of blue and purple — and affectionately known in the Livingetc office as 'blurple' — indigo sits on the color spectrum ...

While violet hits your eye with a specific wavelength, purple only exists in your perception — a clever construct built from ...

Purple is a combination of wavelengths from opposite extremes of the spectrum, which technically deosn’t make any sense, but ...

Illustration by Aurélia Fronty Q: I’ve heard that purple was called the royal color because purple dye ... coloring a fabric with a blue dye, like indigo or woad, and a red dye, like madder.