Monochrome palette
Oyster Lighthouse
Dark anchor, working middle, light release: #005281, #007bbf, #3397dd, #58a6e2, #77c3ff form a tetradic monochrome 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.
skymonochromefive-stop
#005281
#007bbf
#3397dd
#58a6e2
#77c3ff
The generator opens with #005281 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.