The white flowers kind of look like Stephanotis. Not sure about the blue ones. Check out bloomsbythebox.com to see if you can find something similar to the blue ones.
They are delphiniums. My girlfriend just had this exact bouquet made for her wedding this past Saturday. However, they were silk flowers because it was a destination wedding and she didn't want to worry about it. They were absolutely beautiful and very reasonable. She got them from a store on Etsy.com from lovetheblooms (all one word).
Re: What kind of flower are these???