Monochrome palette
Birch Gazebo
Five monochrome stops with room to breathe — #004467 grounds, #006da1 and #2f88be do the talking, #5197c5 softens, #6db3e3 lifts. The analogous 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.
skymonochromefive-stophigh-contrast
#004467
#006da1
#2f88be
#5197c5
#6db3e3
The generator opens with #004467 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.