Monochrome palette
River Boulevard
From #005685 ink through #307fb6, #4e9bd3, #6baadb to #87c7f9 light, River Boulevard is a 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 for large text.
skymonochromefive-stop
#005685
#307fb6
#4e9bd3
#6baadb
#87c7f9
The generator opens with #005685 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.