Potion of Perception (Brewed with Amethyst)

Its base could be the traditional Awkward Potion, but I feel that Night Vision might be an appropriate alternative.

What I envision is a status effect giving everything a purple hue except entities, while also revealing invisible entities.

Invisible entities (in this case I mean players) could be given the same purple hue as their surroundings to give them a chance to escape.