Nebula palette
Pale Marsh
From #006d91 ink through #0099ca, #3bb6e8, #66c4ef to #9ddfff light, Pale Marsh is a complementary 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.
cyannebulafive-stop
#006d91
#0099ca
#3bb6e8
#66c4ef
#9ddfff
The generator opens with #006d91 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.