Nebula palette
Dewey Mesa
Five nebula stops with room to breathe — #006660 grounds, #07948b and #3bb0a7 do the talking, #63bdb4 softens, #80dbd1 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
#006660
#07948b
#3bb0a7
#63bdb4
#80dbd1
The generator opens with #006660 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.