Ghostly pale skin due to too much time in front of a computer, not enough time outside.
Most commonly seen in junior investment bankers and management consultants. These guys spend all their time creating PowerPoint presentations and rarely get outside during daylight hours.
"Hey, have you seen Alex since he started working at that consulting firm?"
"Yeah, they must be working him night and day - he has the worst case of PowerPoint Pallor I've seen in a long while! He really needs to get some sun."