Sumi palette
Iris Heath
Dark anchor, working middle, light release: #ca5300, #287cde, #008f8f, #e97030, #00aeae form a triadic sumi set with somewhere to stand at every lightness. Made for hotel key cards and lobby signage in one system.
skysumifive-stop
#ca5300
#287cde
#008f8f
#e97030
#00aeae
The generator opens with #ca5300 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.