Nebula palette
Seafoam Parlor
Five nebula stops with room to breathe — #004465 grounds, #006d9e and #2f88bb do the talking, #5197c2 softens, #6db3e0 lifts. The split-complementary bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
skynebulafive-stophigh-contrast
#004465
#006d9e
#2f88bb
#5197c2
#6db3e0
The generator opens with #004465 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.