If you are planning to use blue flowers as part of your wedding colour scheme then this flower may be a possibility.
The photo here is a close up of an agapanthus flower, it is a beautiful blue colour and the individual flower heads are a lovely trumpet shape.
The flower heads work really well when individually wired and used in bridal bouquets, buttonholes and corsages.
For more information on blue wedding flowers visit http://www.wedding-flowers-guide.com/blue-wedding-flowers.html