Monochrome palette
Vernal Loft
From #005489 ink through #007dc9, #3399e7, #59a9ec to #84c5ff light, Vernal Loft is a analogous 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
#005489
#007dc9
#3399e7
#59a9ec
#84c5ff
The generator opens with #005489 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.