Petrichor palette
Cordovan Courtyard
From #004856 ink through #007287, #308da3, #539bad to #6fb7ca light, Cordovan Courtyard is a monochromatic 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.
cyanpetrichorfive-stophigh-contrast
#004856
#007287
#308da3
#539bad
#6fb7ca
The generator opens with #004856 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.