Aurora palette
Emerald Clearing
Dark anchor, working middle, light release: #2338a4, #4765ce, #6081ed, #7493ef, #95b1ff 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.
skyaurorafive-stophigh-contrast
#2338a4
#4765ce
#6081ed
#7493ef
#95b1ff
The generator opens with #2338a4 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.