Jewel palette
North Crater
Dark anchor, working middle, light release: #0c3799, #3663c3, #4f7fe1, #6690e5, #83adff form a analogous 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
#0c3799
#3663c3
#4f7fe1
#6690e5
#83adff
The generator opens with #0c3799 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.