Jewel palette
Prairie Marsh
From #004854 ink through #007285, #308da1, #539bab to #6fb7c8 light, Prairie Marsh is a triadic progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
cyanjewelfive-stophigh-contrast
#004854
#007285
#308da1
#539bab
#6fb7c8
The generator opens with #004854 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.