madoromi's palette data, unmodified, from https://github.com/the-moonwitch/madoromi
(`palettes/madoromi.json` at f8bcc5aa1ec3f731fcba9471be7caa5df1ab5695). by samhain, under the MPL-2.0 in LICENSE here.
the colours are measured from scans of pilot's iroshizuku inks.

site/src/lib/palettes.ts reads it at build time and turns each season into a palette.