Aurora palette
Calico Crater
Five aurora stops with room to breathe — #004654 grounds, #007085 and #308ba1 do the talking, #5299ab softens, #6eb5c8 lifts. The complementary bones keep it coherent across national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA as a text pair.
cyanaurorafive-stophigh-contrast
#004654
#007085
#308ba1
#5299ab
#6eb5c8
The generator opens with #004654 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.