Retro palette
Jute Lodge
Five retro stops with room to breathe — #004473 grounds, #306ca0 and #4b87bd do the talking, #6496c4 softens, #7fb2e2 lifts. The analogous bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA as a text pair.
skyretrofive-stophigh-contrast
#004473
#306ca0
#4b87bd
#6496c4
#7fb2e2
The generator opens with #004473 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.