When ripe, indigo rose tomato is actually red with black “cheeks”, which vary in intensity. Unripe fruits are often quite black, but as they ripen, the dark shades give way to bright green and finally red with increasing maturity, whereby the area around the stem base almost always remains blackish. This shade of black of immature fruits has a deep blueish, slightly purplish shimmer in the right light. The dark colour is caused by the antioxidant anthocyanin, which is produced in unusual amounts in the fruits. Sometimes the pigment can enter the pulp from the skin. This variety was cultivated at Oregon State University.
They are very decorative fruits, which also taste aromatic and fruity sweet-sour. Indigo rose tomato belongs to the rather small-fruited varieties and can be eaten directly from the shrub.