Nebula palette
Seaside Beacon
From #6d51b6 ink through #3662be, #00719a, #4f7edc to #008dc0 light, Seaside Beacon is a analogous progression that holds together at any size. Use it for book covers that read at thumbnail size.
skynebulafive-stop
#6d51b6
#3662be
#00719a
#4f7edc
#008dc0
The generator opens with #6d51b6 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.