Nebula palette
Mulberry Heath
From #004669 ink through #006fa3, #308ac0, #5299c7 to #6eb5e5 light, Mulberry Heath is a monochromatic progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
skynebulafive-stophigh-contrast
#004669
#006fa3
#308ac0
#5299c7
#6eb5e5
The generator opens with #004669 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.