Colorino | Family or group of distinct grape varieties which includes Colorino di Pisa, Colorino di Lucca, Colorino Americano and Colorino del Valdarno. All members have in common the capacity to make deeply coloured wine, useful as a blending component. In addition, the Colorino family are easy to identify in the vineyard because towards harvest time the leaves turn dark red. Of the four, the Colorino del Valdarno is the one with the best winemaking potential.
Italian Wine Unplugged (Positive Press, 2017), p.46.