I keep a colour‑swatch book, each page labelled by year and line, and a spreadsheet that logs hex codes, Pantone references, and a quick note on the fashion beat that year. Every decade I pull the original paint chips, scan them, and tag them with a trend keyword—think “neon rave” or “pastel lull.” If a hue slips between two categories, I give it a “misc” tag and a joke sticker. It keeps the catalog tidy, but the occasional misfile makes my day.