Petrichor palette
Ebony Reef
Five stops tuned to sit together without fighting — #006667 ink anchors the set, #339799 opens it up, and #9a5559, #007c7e, #b77073 cross the middle in a analogous arrangement. Ebony Reef suits event posters that compete with a wall of other posters.
cyanpetrichorfive-stop
#006667
#9a5559
#007c7e
#b77073
#339799
The generator opens with #006667 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.