Acid palette
Rainy Cellar
From #004654 ink through #007085, #308ba1, #5299ab to #6eb5c8 light, Rainy Cellar 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.
cyanacidfive-stophigh-contrast
#004654
#007085
#308ba1
#5299ab
#6eb5c8
The generator opens with #004654 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.