Sumi palette
Kindled Courtyard
From #9d2d10 ink through #b54429, #007b90, #d46045 to #0099b2 light, Kindled Courtyard is a analogous progression that holds together at any size. Use it for book covers that read at thumbnail size.
redsumifive-stop
#9d2d10
#b54429
#007b90
#d46045
#0099b2
The generator opens with #9d2d10 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.