Blue Hour palette
Smoky Kiln
From #716eba ink through #447bbb, #0086a7, #5f97d9 to #26a2c7 light, Smoky Kiln is a tetradic progression that holds together at any size. Use it for book covers that read at thumbnail size.
skybluehourfive-stop
#716eba
#447bbb
#0086a7
#5f97d9
#26a2c7
The generator opens with #716eba as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.