Petrichor palette
Steely Square
From #b65c00 ink through #d46c00, #0098d1, #f38834 to #00b6f9 light, Steely Square is a split-complementary progression that holds together at any size. Use it for book covers that read at thumbnail size.
orangepetrichorfive-stop
#b65c00
#d46c00
#0098d1
#f38834
#00b6f9
The generator opens with #b65c00 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.