Monochrome palette
Leaden Lighthouse
From #004d60 ink through #007893, #3293af, #56a1b9 to #72bed6 light, Leaden Lighthouse is a analogous progression that holds together at any size. Use it for national-park posters with layered mountain silhouettes. The darkest and lightest stops clear AA as a text pair.
cyanmonochromefive-stophigh-contrast
#004d60
#007893
#3293af
#56a1b9
#72bed6
The generator opens with #004d60 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.