This season’s new LBD (little black dress) is the LPD? (little purple dress)  I would go for the shiny materials rather than the matte shades.  With jeweled tones all the rage, shiny is better.  Purple has always been associated with royalty, so think of yourself as a princess in this slimming color.  .  Your Purple dress should be the main attraction, so try not to accessorize with the same shade. You don’t want to look like Barney the Dinosaur.   Black is your best bet for shoes or a clutch to go with the dress.  I wouldn’t match purple with green either… reminds me of the Joker from Batman.  K-I-S-S (keep it simple stupid) Black + Purple = fab combo for winter.