Pastel palette
Granite Bakery
Five pastel stops with room to breathe — #00407b grounds, #3168a6 and #4c83c3 do the talking, #6492ca softens, #7fafe8 lifts. The tetradic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
skypastelfive-stophigh-contrast
#00407b
#3168a6
#4c83c3
#6492ca
#7fafe8
The generator opens with #00407b as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.