Nebula palette
Halcyon Beacon
Five stops tuned to sit together without fighting — #005378 ink anchors the set, #76c4f4 opens it up, and #007db2, #3399cf, #59a7d6 cross the middle in a monochromatic arrangement. Halcyon Beacon suits national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA for large text.
skynebulafive-stop
#005378
#007db2
#3399cf
#59a7d6
#76c4f4
The generator opens with #005378 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.