Monochrome palette
Calico Cellar
From #2a6530 ink through #568e59, #71aa73, #87b788 to #a3d4a4 light, Calico Cellar is a analogous 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.
greenmonochromefive-stop
#2a6530
#568e59
#71aa73
#87b788
#a3d4a4
The generator opens with #2a6530 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.