Nebula palette
River Depot
From #005f8e ink through #008acb, #37a6e9, #5fb5ef to #90d1ff light, River Depot 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
#005f8e
#008acb
#37a6e9
#5fb5ef
#90d1ff
The generator opens with #005f8e as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.