Sumi palette
Bracken Estuary
From #880028 ink through #b53f4f, #d45b68, #db747c to #fb8f97 light, Bracken Estuary is a tetradic progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
redsumifive-stophigh-contrast
#880028
#b53f4f
#d45b68
#db747c
#fb8f97
The generator opens with #880028 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.