Prairie palette
Vintage Harbor
From #00616f ink through #008da1, #37a9bd, #5fb7c8 to #7dd4e5 light, Vintage Harbor is a analogous 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.
cyanprairiefive-stop
#00616f
#008da1
#37a9bd
#5fb7c8
#7dd4e5
The generator opens with #00616f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.