Purple is much prettier than grey.

"What is color? I used to think that white is all color as it reflects all wavelengths, and black is no color as it absorbs all light. Those are true. Yet it is also true that black is all colors, as when one combines all colors of paint, black results. To us, color is what our brains tell us we see based on the wavelengths of light reflected by the surface and detected by the receptors in our retinas. To another species, earthly or extra-terrestrial, the colors we perceive in an object may look entirely different. Yet, is it different? The lenses through which we observe various matters, both tangible and intangible, color our perspectives."

Hip hip hooray, you haven't read my essay on shades of grey: https://medium.com/pitfall/the-world-especially-the-middle-east-reflects-more-shades-of-grey-than-any-box-of-crayola-crayons-50dca751d2db