Sumi palette
Sleepy Plaza
Dark anchor, working middle, light release: #aa2838, #c2404b, #00858a, #e25d65, #00a3a9 form a tetradic sumi set with somewhere to stand at every lightness. Made for book covers that read at thumbnail size.
redsumifive-stop
#aa2838
#c2404b
#00858a
#e25d65
#00a3a9
The generator opens with #aa2838 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.