Identification of a Flower

Bev
by Bev
Can you tell me what this flower is? It also blooms in blue. My neighbor has them and she gave me some. I have been able to take some really nice pictures of them. I would like a name for my pictures!
Here is a white one.
Here are the blue ones, with a white one in the back.
The flower reminds me of ballerina tutus.
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