Retro palette
Silvery Manor
Five retro stops with room to breathe — #2a417d grounds, #5069a6 and #6984c3 do the talking, #7c94ca softens, #97b0e8 lifts. The split-complementary 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
#2a417d
#5069a6
#6984c3
#7c94ca
#97b0e8
The generator opens with #2a417d as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.