Flowers

I may have found a blue flower... but we'll see. Delphiniums. They come in blue and they come in a light sky blue to a dark blue.

http://www.wedding-flowers-guide.com/blue-wedding-flowers.html

Quoting that webpage....

Some of the classic wedding flowers are not available in blue. These include calla lilies, tulips, gerberas, orchids, carnations, gladioli, anthuriums and roses. You can get artificially dyed roses from specialist suppliers. These are white roses that have been grown in a blue dye. But some people think that their vibrant color just doesn't look right.

You can get around this problem by the creative use of accessories such as blue ribbons and organza. You can also complement your blue wedding flowers with white varieties such as roses and calla lilies to give a more traditional feel.