Jewel palette
River Cellar
Five jewel stops with room to breathe — #00475e grounds, #007193 and #308caf do the talking, #539ab8 softens, #6fb6d5 lifts. The analogous bones keep it coherent across national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA as a text pair.
cyanjewelfive-stophigh-contrast
#00475e
#007193
#308caf
#539ab8
#6fb6d5
The generator opens with #00475e as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.