Petrichor palette
Opal Moor
From #004d4f ink through #00797c, #329497, #55a1a4 to #72bec0 light, Opal Moor is a tetradic progression that holds together at any size. Use it for event posters that compete with a wall of other posters. The darkest and lightest stops clear AA as a text pair.
cyanpetrichorfive-stophigh-contrast
#004d4f
#00797c
#329497
#55a1a4
#72bec0
The generator opens with #004d4f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.