Petrichor palette
Satin Square
Satin Square runs #2a6d90 through #00737d, #1b7563, #308e98 to #3d907d in five measured steps, the tetradic structure keeping every neighbor honest. Reach for it for book covers that read at thumbnail size.
cyanpetrichorfive-stop
#2a6d90
#00737d
#1b7563
#308e98
#3d907d
The generator opens with #2a6d90 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.