Sumi palette
Polar Patio
From #7d2200 ink through #aa4d31, #c8684b, #d07d64 to #ef997f light, Polar Patio is a monochromatic 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
#7d2200
#aa4d31
#c8684b
#d07d64
#ef997f
The generator opens with #7d2200 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.