Sumi palette
Crocus Gazebo
From #7d2200 ink through #bb3b0b, #da5931, #e17251 to #ff8f6e light, Crocus Gazebo is a analogous progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
redsumifive-stop
#7d2200
#bb3b0b
#da5931
#e17251
#ff8f6e
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.