Nebula palette
Hyacinth Cellar
Dark anchor, working middle, light release: #452f83, #6a59ac, #8474c9, #9286d0, #aea2ee form a triadic nebula set with somewhere to stand at every lightness. Made for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
bluenebulafive-stophigh-contrast
#452f83
#6a59ac
#8474c9
#9286d0
#aea2ee
The generator opens with #452f83 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.