Aurora palette
Vintage Bookshop
Dark anchor, working middle, light release: #363ca9, #5a69d3, #7385f2, #8597f5, #a7b7ff form a tetradic aurora 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.
blueaurorafive-stophigh-contrast
#363ca9
#5a69d3
#7385f2
#8597f5
#a7b7ff
The generator opens with #363ca9 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.