Blue Hour palette
Tumbleweed Kiln
From #006587 ink through #0091c0, #39adde, #62bce5 to #88d8ff light, Tumbleweed Kiln is a tetradic 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.
cyanbluehourfive-stop
#006587
#0091c0
#39adde
#62bce5
#88d8ff
The generator opens with #006587 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.