As you can see in the video below, the moment GLaDOS says she deletes Caroline, a bit of warm light that was in the room is dimmed, making the entire room even more blue. This is later repeated in the end scene, where regardless of what portals you shoot, the one in Aperture Laboratories (where GLaDOS is in the end) is orange, and the one on the moon (where Wheatley is) is blue.Īs with Portal 1, the Laboratories are cold and blue, while old Aperture with Cave Johnson has, again, a warmer, orange feel to it.Ī more subtle example was in the end speech, right before you were sent up in the elevator. The most obvious one would be GLaDOS, having an orange eye, and Wheatley, having a blue eye. The checkmark/cross signs that show the status of an objective.The excursion funnel (blue when pushing, orange when pulling).The first one was actually in Portal 1, where Aperture Laboratories are very cool and blue, while the behind the scenes bits after the last test chamber have a more warm, orange feel. Well, just for posterity, the origin of all this is probably the portal gun itself. Note, the following is going to contain spoilers for both Portal games. I'm only going by my own experience of the game so this is likely incomplete, but there are a lot of noticeable examples of symbolism occurring throughout the game. I'm just listing examples in ways Valve used it here. Note that Orange Blue Contrast is a common trope in media. It's an ingenious twisting of Portal's themes: GLaDOS sets you off along the track, and you swiftly glide over the level's orange gel tracks and bouncing over obstacles on the blue gel.

Portal 2 orange gel