Often we get questions at www.heavyglare.com about the different colors of mirrored lenses that Oakley offers. Two lenses that are often asked about are the Oakley Violet iridium lenses and the Oakley positive red iridium lenses. The lenses both initially appear to be a violet or purple color, but you can see the difference when you change the angle of the glasses to the respective light source. The Oakley Violet iridium lenses will turn blue has the late shifts. And the Oakley positive red iridium, Will turn from violet to a deep plum red.