Nebula palette
Marble Bookshop
From #4b2883 ink through #7153ac, #8b6ec9, #9881d0 to #b49dee light, Marble Bookshop 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.
bluenebulafive-stophigh-contrast
#4b2883
#7153ac
#8b6ec9
#9881d0
#b49dee
The generator opens with #4b2883 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.