Aurora palette
Overcast Heath
From #223d82 ink through #4866ab, #6181c8, #7591cf to #90aded light, Overcast Heath is a split-complementary 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
#223d82
#4866ab
#6181c8
#7591cf
#90aded
The generator opens with #223d82 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.