Nebula palette
Caramel Cabin
Five nebula stops with room to breathe — #00368c grounds, #2d60b8 and #477bd6 do the talking, #5f8cda softens, #79a9f8 lifts. The analogous 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
#00368c
#2d60b8
#477bd6
#5f8cda
#79a9f8
The generator opens with #00368c as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.