Sumi palette
Emerald Harbor
Dark anchor, working middle, light release: #a40028, #bf2339, #00797f, #df4653, #00979d form a tetradic sumi set with somewhere to stand at every lightness. Made for event posters that compete with a wall of other posters.
redsumifive-stop
#a40028
#bf2339
#00797f
#df4653
#00979d
The generator opens with #a40028 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.