Nebula palette
Rosewood Oasis
From #00398a ink through #175fca, #357be9, #528deb to #75abff light, Rosewood Oasis 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 as a text pair.
skynebulafive-stophigh-contrast
#00398a
#175fca
#357be9
#528deb
#75abff
The generator opens with #00398a as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.