This is really fascinating, do you remember anything about the timeframe, if you found yourself getting cold or hot, and was there any nausea?The weirdest psychedelic experience I had was from an unknown drug. It was liquid that was being passed around as LSD in a psychedelic-naive crowd, but a few people had bad experiences apparently, so a friend gave me the bottle for free. There was a small amount of crystals precipitating out of solution at the bottom of the bottle, so I knew immediately it wasn't LSD.
One night I got drunk and took 2 hits of this mysterious liquid out of curiosity, before I had a chance to test it.
It was a fairly enjoyable trip, albeit weird. Very tactile and sensory, but lacking in the visuals department, which were mostly absent other than perceptual distortions... anyways the strangest thing happened with colors. This drug made my vision go black and white. Greyscale. Colors were just GONE. Yet, there were waves of color that would come back, almost as if someone was using a paintbrush across my vision, one color at a time, but I remember purple most commonly. Brushing the colors back in, which would then fade back to greyscale. This lasted a good 6 hours at least.
Now, I do have a type of colorblindness called "deuteranopia", which means my green and red trichromes overlap. Thus, green and red colors confuse me; sometimes they look like the same color, sometimes it's difficult to distinguish between orange/red or green/brown... but I see all other colors just fine. It's not like total colorblindness at all.
This experience was so bizzare, seeing in black in white, and opposite to every other trip I've had which are always extremely colorful in nature.
I never did figure out what that mystery drug was. I threw the bottle away shortly afterwards for unrelated reasons. Possibly some 2-Cx derivative, or something more exotic, is my guess. It did not feel like a tryptamine or any nBOME.
I've never consumed it, but your account reminds me of other accounts of 5-MeO-AMT a little bit, just based on reading TR's. Have you ever experienced the colorblindness thing in your dreams, or at any other point in your life?