Acid palette
Topaz Crater
Five acid stops with room to breathe — #00615d grounds, #008e89 and #37aaa4 do the talking, #5fb7b2 softens, #7cd4cf 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.
cyanacidfive-stop
#00615d
#008e89
#37aaa4
#5fb7b2
#7cd4cf
The generator opens with #00615d as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.