Opera palette
Emerald Prairie
Five opera stops with room to breathe — #155f91 grounds, #4989bb and #65a5d8 do the talking, #7eb4e0 softens, #9ad1ff lifts. The analogous bones keep it coherent across national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA for large text.
skyoperafive-stop
#155f91
#4989bb
#65a5d8
#7eb4e0
#9ad1ff
The generator opens with #155f91 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.