Petrichor palette
Umber Square
Umber Square runs #005453 through #00807f, #349b9a, #58a9a7 to #75c5c4 in five measured steps, the analogous structure keeping every neighbor honest. Reach for it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA for large text.
cyanpetrichorfive-stop
#005453
#00807f
#349b9a
#58a9a7
#75c5c4
The generator opens with #005453 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.