Nebula palette
Halcyon Junction
From #006391 ink through #2d8dc4, #4da9e2, #6eb8e9 to #95d4ff light, Halcyon Junction is a monochromatic progression that holds together at any size. Use it for national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA for large text.
skynebulafive-stop
#006391
#2d8dc4
#4da9e2
#6eb8e9
#95d4ff
The generator opens with #006391 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.