Acid palette
Restful Crater
Five acid stops with room to breathe — #004b49 grounds, #007774 and #31928f do the talking, #549f9c softens, #71bcb8 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.
cyanacidfive-stophigh-contrast
#004b49
#007774
#31928f
#549f9c
#71bcb8
The generator opens with #004b49 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.