Blue Hour palette
Iris Dock
From #5c50b9 ink through #0062bb, #006e8b, #2c7ed9 to #008bae light, Iris Dock is a tetradic progression that holds together at any size. Use it for book covers that read at thumbnail size.
bluebluehourfive-stop
#5c50b9
#0062bb
#006e8b
#2c7ed9
#008bae
The generator opens with #5c50b9 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.