Jewel palette
River Glade
Dark anchor, working middle, light release: #004890, #3672bb, #518ed9, #6a9ede, #86bafd 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 for large text.
skyjewelfive-stop
#004890
#3672bb
#518ed9
#6a9ede
#86bafd
The generator opens with #004890 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.