This is definitely moving away from the 'norm' as far as colour combinations go, but it's ever so pretty! However I do think you need to be very careful with it so as not to turn it into a garish eyesore!! I would pick out a couple of key elements to bring the colour into and then use lots of fresh white. The florals are an obvious choice... especially using this centrepiece as inspiration. Those purple hydrangeas are just gorgeous, and with that teeny pop of yellow it just introduces a hint of that colour. Follow through with a pop of the yellow on your cake, and perhaps have your bridesmaids in a pretty shade of lilac, but I wouldn't be trying to throw these colours into everything. It's definitely a case of less is more in my opinion.