Nebula palette
Dewey Fen
From #0957a2 ink through #4182cc, #5d9eea, #77aef0 to #9fcbff light, Dewey Fen is a analogous progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
skynebulafive-stop
#0957a2
#4182cc
#5d9eea
#77aef0
#9fcbff
The generator opens with #0957a2 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.