Sumi palette
River Atelier
Five stops tuned to sit together without fighting — #da5c4b ink anchors the set, #49c16c opens it up, and #6481eb, #23a451, #fa7966 cross the middle in a triadic arrangement. River Atelier suits hotel key cards and lobby signage in one system.
greensumifive-stop
#da5c4b
#6481eb
#23a451
#fa7966
#49c16c
The generator opens with #da5c4b as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.