Some people like to spend their free time playing video games, Pinterest-planning their (imaginary) dream wedding, backpacking across countries or learning about wine. Me? I like to think about color. I collect different hues in my head: the blue-purple of jacaranda trees that almost seems to glow, the cheery yellow reflected off a canary’s wing, the radiant gradient of Flaming June‘s robe. Color is often the first thing I notice about an object, and I tend to catalogue the colors I see, one by one, in my mind palace until I’m left with an intangible, but no less pleasant filing drawer filled with folders marked ROYGBIV.