Petrichor palette
Luminous Bluff
From #004b4f ink through #00767c, #319197, #549ea3 to #70bbc0 light, Luminous Bluff is a triadic 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
#004b4f
#00767c
#319197
#549ea3
#70bbc0
The generator opens with #004b4f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.