Aurora palette
Plum Library
Dark anchor, working middle, light release: #23438c, #4a6db6, #6388d4, #7899da, #93b5f8 form a analogous 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.
skyaurorafive-stophigh-contrast
#23438c
#4a6db6
#6388d4
#7899da
#93b5f8
The generator opens with #23438c as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.