Petrichor palette
Tranquil Kiln
From #004c5a ink through #00778c, #3292a8, #55a0b2 to #72bccf light, Tranquil Kiln is a monochromatic progression that holds together at any size. Use it for book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
cyanpetrichorfive-stop
#004c5a
#00778c
#3292a8
#55a0b2
#72bccf
The generator opens with #004c5a as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.