Jewel palette
Earthen Boulevard
Dark anchor, working middle, light release: #00338f, #235cc5, #3e78e4, #578ae6, #76a7ff form a monochromatic 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
#00338f
#235cc5
#3e78e4
#578ae6
#76a7ff
The generator opens with #00338f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.