Garnet (common colour name): Red:In the diamond trade, the name garnet can be applied to a broad range of colours includ ing brownish red (br-R) through reddish brown (r-BR), orangish reddish brown (o-r-BR), purplish red (pp-R), pinkish purp le (pk-PP), and red-purple (R-PP) hues that exhibit deep tones.