Nebula palette
Leaden Bookshop
Five nebula stops with room to breathe — #0064b3 grounds, #348fe8 and #5dacff do the talking, #7fbcff softens, #b5d8ff lifts. The tetradic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
skynebulafive-stop
#0064b3
#348fe8
#5dacff
#7fbcff
#b5d8ff
The generator opens with #0064b3 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.