Storybook palette
Mercurial Crater
From #00678b ink through #0093c4, #39afe2, #63bee9 to #8fdaff light, Mercurial Crater is a split-complementary 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.
cyanstorybookfive-stop
#00678b
#0093c4
#39afe2
#63bee9
#8fdaff
The generator opens with #00678b as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.