Monochrome palette
Twilit Deck
From #004670 ink through #006ead, #2f89ca, #5299d0 to #6eb5ee light, Twilit Deck is a analogous progression that holds together at any size. Use it for newsletters where the header, links, and footers share one voice. The darkest and lightest stops clear AA as a text pair.
skymonochromefive-stophigh-contrast
#004670
#006ead
#2f89ca
#5299d0
#6eb5ee
The generator opens with #004670 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.