Nebula palette
Plum Oasis
Five nebula stops with room to breathe — #00544f grounds, #008079 and #349b94 do the talking, #58a9a2 softens, #75c5be lifts. The tetradic bones keep it coherent across book covers that read at thumbnail size. The darkest and lightest stops clear AA for large text.
cyannebulafive-stop
#00544f
#008079
#349b94
#58a9a2
#75c5be
The generator opens with #00544f as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.