Monochrome palette
Vintage Chapel
From #3b6fa0 ink through #007890, #007c75, #3293ac to #2d9891 light, Vintage Chapel is a analogous progression that holds together at any size. Use it for hotel key cards and lobby signage in one system.
skymonochromefive-stop
#3b6fa0
#007890
#007c75
#3293ac
#2d9891
The generator opens with #3b6fa0 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.