Pastel palette
Marble Beacon
Five pastel stops with room to breathe — #006039 grounds, #3b8960 and #58a57a do the talking, #72b28d softens, #8ecfa9 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.
greenpastelfive-stop
#006039
#3b8960
#58a57a
#72b28d
#8ecfa9
The generator opens with #006039 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.