Benjamin Moore's Shadow 2117-30 was created to play beautifully in the "purple sandbox"! Porcelain 2113-60, Sea Life 2118-40, Wet Concrete 2114-40, Sandlot Gray 2107-50, Stormy Monday 2112-50, Wish AF-680.
Benjamin Moore: Hazy Lilac 2116-40 http://www.benjaminmoore.com/en-us/paint-color/hazylilac#ce_s=hazy
Benjamin Moore Camelot is the most ‘purple’ of the bunch mentioned here. Camelot has a strong purple tone, without becoming ‘royal’. Also check out, Benjamin Moore Vintage Wine or Amazon Soil. Vintage Wine is very rich, dark and subtle, without looking ‘grape-ish’. Amazon Soil has a slightly more pink undertone compared to the options above