Color turns a portal into a destination sign
A portal is a doorway without the ordinary clues that help travelers choose a route: no street name, landscape, or visible path beyond the frame. When several portals look alike, a distinct glow gives each one a quick visual identity. A mage can scan the openings and pick a destination before stepping through, rather than discovering the mistake after arrival.
The choice happens at the threshold
That matters because portals compress travel into a single action. The traveler does not follow a route and correct course along the way; the decision is made at the entrance. Color puts the identifying cue exactly where it is needed, visible even when the destination itself cannot be seen. It also lets the game communicate the choice without adding labels or instructions to every doorway.
The glow is therefore more than atmosphere. It is a small piece of wayfinding design: the magic removes distance, while the color helps prevent a wrong turn. In a world where one step can cross into another realm, recognizing the doorway before entering is the whole journey’s most practical navigation aid.
