Feast your eyes on the world's first and only blue rose.

From the article:

Australian and Japanese researchers have demonstrated the application of RNAi technology for gene replacement in plants, developing the world's only blue rose.

Breeders had attempted to make true blue roses for several years, but none had successfully bred roses with blue pigment until fairly recently.  In its first commercial application in plants, technology was used to remove the gene encoding the enzyme dihydroflavonol reductase (DFR) in roses.