Time window/Mad

The Dragon from Mars
It's worth mentioning that the "portal from Mars" in Theo's story is drawn in the same style as the time windows.

Blue Tint
If the temporal physics behind the time windows have any affect on light, then it's possible that a doppler shift accounts for the blue color of the window and the figures inside.

Responses

 * It could have been an artistic choice, done to set the portal apart from the surrounding reds.
 * It just looked nifty.