Nebula palette
Herbal Square
From #005c9d ink through #3d86c9, #59a2e7, #75b2ed to #9dceff light, Herbal Square is a split-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.
skynebulafive-stop
#005c9d
#3d86c9
#59a2e7
#75b2ed
#9dceff
The generator opens with #005c9d as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.