Sumi palette
Grassy Square
Dark anchor, working middle, light release: #a5454f, #007495, #007c5b, #c36068, #009a72 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
#a5454f
#007495
#007c5b
#c36068
#009a72
The generator opens with #a5454f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.