Aurora palette
Pale Alley
Dark anchor, working middle, light release: #323f80, #5868a9, #7183c6, #8393cd, #9eafeb form a split-complementary aurora set with somewhere to stand at every lightness. Made for national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA as a text pair.
skyaurorafive-stophigh-contrast
#323f80
#5868a9
#7183c6
#8393cd
#9eafeb
The generator opens with #323f80 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.