Blue roses. This was thought to be impossible until Suntory and Australian bio venture FlorigenePty, Ltd., figured it out. They took blue color pigment from blue flowers, and then used "recombinant DNA techniques" to add them to the roses. I put quotes around "recombinant DNA techniques" to say that I have no clue what that exactly entails, so if the caption writer got it wrong I got it wrong.
Back in the day there was some sort of CODE that went along with roses... where different colors had different specific meanings, like red for love, white for friendship, yellow for peeing yourself with excitement, and so forth. So what's blue? "I'd like you to join our group of zombies." I dunno.