Petrichor palette
Bitter Harbor
From #004b4b ink through #007677, #319192, #549e9f to #70bbbb light, Bitter Harbor is a analogous progression that holds together at any size. Use it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA as a text pair.
cyanpetrichorfive-stophigh-contrast
#004b4b
#007677
#319192
#549e9f
#70bbbb
The generator opens with #004b4b as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.