Aurora palette
Sage Oasis
Five aurora stops with room to breathe — #343479 grounds, #585da2 and #7178bf do the talking, #8188c6 softens, #9ca4e4 lifts. The tetradic bones keep it coherent across national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA as a text pair.
skyaurorafive-stophigh-contrast
#343479
#585da2
#7178bf
#8188c6
#9ca4e4
The generator opens with #343479 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.