Sumi palette
Fiery Gazebo
From #9c1c3d ink through #b43650, #007b79, #d35369 to #009996 light, Fiery Gazebo is a tetradic progression that holds together at any size. Use it for book covers that read at thumbnail size.
redsumifive-stop
#9c1c3d
#b43650
#007b79
#d35369
#009996
The generator opens with #9c1c3d as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.