Monochrome palette
Ashen Bluff
From #005a67 ink through #008698, #36a2b4, #5cafbf to #79ccdc light, Ashen Bluff 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.
cyanmonochromefive-stop
#005a67
#008698
#36a2b4
#5cafbf
#79ccdc
The generator opens with #005a67 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.