An Etymological Dictionary of the German Language/Farbe
Farbe, f., ‘colour, complexion, suit (of cards),’ from MidHG. varwe, OHG. farawa, ‘colour’; a fem, subst. from the MidHG. adj. var, inflected form varwer, ‘coloured,’ from OHG. faro (nom. farawêr); comp. Du. verw. The word originated probably in Middle Europe, but found its way to the North; Dan. farve, Swed. färg. Is Goth. *farwa-, adj. (whence Lith. parwas, ‘colour’), or *fazwa to be postulated?