Petrichor palette
Earthen Lighthouse
Five stops tuned to sit together without fighting — #004650 ink anchors the set, #6eb5c3 opens it up, and #007080, #308b9b, #5298a6 cross the middle in a complementary arrangement. Earthen Lighthouse suits book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
cyanpetrichorfive-stophigh-contrast
#004650
#007080
#308b9b
#5298a6
#6eb5c3
The generator opens with #004650 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.