Blue Hour palette
Zephyr Cabin
From #235392 ink through #895d00, #3767a8, #a8761d to #5182c5 light, Zephyr Cabin is a tetradic progression that holds together at any size. Use it for book covers that read at thumbnail size.
skybluehourfive-stop
#235392
#895d00
#3767a8
#a8761d
#5182c5
The generator opens with #235392 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.