Isolated anthocyanins Visual detection thresholds (mg/L) Color activity value (CAV) for Pinot Noir grape pomace Color activity value (CAV) for Merlot grape pomace Color activity value (CAV) for Vranec grape pomace Dephinidin-3-glucoside 2 <1 <1 <1 Cyanidin-3-glucoside 1 <1 2.1 3.3 Petunidin-3-glucoside 0.2 4.0 4.5 4.0 Peonidin-3-glucoside 0.25 2.4 10.8 5.6 Malvidin-3-glucoside 1.25 8.0 11.3 15.2 Malvidin-3-p-coumaroyl-glucoside 0.75 1.2 5.6 7.3

Table 3: Visual detection thresholds and color activity values of isolated anthocyanins.