Nebula palette
Glassy Square
From #57278e ink through #7d54b8, #986fd6, #a483db to #c09ffa light, Glassy Square 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 as a text pair.
bluenebulafive-stophigh-contrast
#57278e
#7d54b8
#986fd6
#a483db
#c09ffa
The generator opens with #57278e as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.