Sumi palette
Russet Mill
From #ac3e00 ink through #5b56bc, #007a52, #cb5a2a to #009967 light, Russet Mill is a analogous progression that holds together at any size. Use it for event posters that compete with a wall of other posters.
bluesumifive-stop
#ac3e00
#5b56bc
#007a52
#cb5a2a
#009967
The generator opens with #ac3e00 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.