Petrichor palette
Fiery Plaza
Five petrichor stops with room to breathe — #004a55 grounds, #007585 and #3190a1 do the talking, #549eac softens, #70bac8 lifts. The tetradic bones keep it coherent across event posters that compete with a wall of other posters. The darkest and lightest stops clear AA as a text pair.
cyanpetrichorfive-stophigh-contrast
#004a55
#007585
#3190a1
#549eac
#70bac8
The generator opens with #004a55 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.