A Rainbow Up the Spine
The chart on the yoga-studio wall shows seven discs stacked from red at the base of the spine to violet at the crown, and it is usually captioned "ancient." This feature follows the colours back through the first English translation of the Sanskrit text that fixed the seven-chakra system, Sir John Woodroffe's The Serpent Power of 1919, and finds that the text has colours of its own, crimson, vermilion, rain-cloud, smoke, and moonlight, but no rainbow; the spectrum was added in the twentieth-century West. The piece explains where it came from, what the old text was for, and what the modern chart keeps and changes.