Way back in 1939, the movie "The Wizard of Oz"
Even back then, movie makers were able to use an effect of turning the film from black and white to color. Well, as it happens, you can achieve this same effect on a picture in your PowerPoint presentation. See how easy it is to create B & W to Color Photo Animations in PowerPoint 2010
Black and White to Color Photo Animations in PowerPoint 2003-2007