Monochrome palette
Heather Brook
From #00638c ink through #2c8ebf, #4daadd, #6eb9e4 to #90d6ff light, Heather Brook is a tetradic 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
#00638c
#2c8ebf
#4daadd
#6eb9e4
#90d6ff
The generator opens with #00638c as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.