Jewel palette
Umber Dairy
Dark anchor, working middle, light release: #314285, #576bae, #7086cb, #8396d2, #9eb3f0 form a tetradic jewel 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.
skyjewelfive-stophigh-contrast
#314285
#576bae
#7086cb
#8396d2
#9eb3f0
The generator opens with #314285 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.