Monochrome palette
Tidal Brook
Five stops tuned to sit together without fighting — #305300 ink anchors the set, #9ac378 opens it up, and #517d22, #6b9840, #7ea65d cross the middle in a tetradic arrangement. Tidal Brook suits event posters that compete with a wall of other posters. The darkest and lightest stops clear AA for large text.
chartreusemonochromefive-stop
#305300
#517d22
#6b9840
#7ea65d
#9ac378
The generator opens with #305300 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.