Sumi palette
Harbor Square
From #a04800 ink through #3263b1, #007478, #be632a to #009197 light, Harbor Square is a monochromatic progression that holds together at any size. Use it for newsletters where the header, links, and footers share one voice.
skysumifive-stop
#a04800
#3263b1
#007478
#be632a
#009197
The generator opens with #a04800 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.