Aurora palette
Ember Mill
From #2b3d83 ink through #5066ac, #6981c9, #7c91d0 to #97adee light, Ember Mill 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.
skyaurorafive-stophigh-contrast
#2b3d83
#5066ac
#6981c9
#7c91d0
#97adee
The generator opens with #2b3d83 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.