Sumi palette
Hickory Shrine
Five stops tuned to sit together without fighting — #a91715 ink anchors the set, #009bab opens it up, and #c1342c, #007d8b, #e15347 cross the middle in a triadic arrangement. Hickory Shrine suits book covers that read at thumbnail size.
redsumifive-stop
#a91715
#c1342c
#007d8b
#e15347
#009bab
The generator opens with #a91715 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.