Frost palette
Halcyon Estuary
Five stops tuned to sit together without fighting — #004f3b ink anchors the set, #75c0a5 opens it up, and #0f7b5f, #379679, #58a389 cross the middle in a tetradic arrangement. Halcyon Estuary suits event posters that compete with a wall of other posters. The darkest and lightest stops clear AA as a text pair.
tealfrostfive-stophigh-contrast
#004f3b
#0f7b5f
#379679
#58a389
#75c0a5
The generator opens with #004f3b as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.