Parma violet

1 :  a sweet violet widely cultivated for its pale lavender sweet-scented fully double flowers

2 or parma violet a :  a moderate violet that is bluer and lighter than damson, bluer and paler than Roman purple, and paler and slightly redder than prelate —called also Parme, violet Parme b of textiles :  a strong violet that is redder and lighter than pansy, redder, lighter, and stronger than royal purple (see royal purple 2), and lighter, stronger, and slightly redder than clematis