Acid palette
Elder Bookshop
From #007470 ink through #00a39d, #3dc0b9, #69cdc7 to #87eae4 light, Elder Bookshop is a tetradic progression that holds together at any size. Use it for hotel key cards and lobby signage in one system. The darkest and lightest stops clear AA for large text.
cyanacidfive-stop
#007470
#00a39d
#3dc0b9
#69cdc7
#87eae4
The generator opens with #007470 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.