Acid palette
Soft Marsh
Five acid stops with room to breathe — #004957 grounds, #007388 and #318ea4 do the talking, #539cae softens, #6fb8cb 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
#004957
#007388
#318ea4
#539cae
#6fb8cb
The generator opens with #004957 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.