Petrichor palette
Amber Hollow
From #005766 ink through #008398, #359fb4, #5bacbf to #78c9dc light, Amber Hollow 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 for large text.
cyanpetrichorfive-stop
#005766
#008398
#359fb4
#5bacbf
#78c9dc
The generator opens with #005766 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.