Color enhancement

Color enhancement is an increase in the perceived vividness, saturation, and brightness of colors beyond their ordinary appearance.

As a drug effect it is acute and dose-proportional, fading cleanly as the substance wears off. It ranges from a subtle lift in color richness at low doses to an overwhelming intensification — hues appearing almost luminous — at high doses.

Color enhancement is among the most consistently reported perceptual effects across psychoactive substances. It is most commonly induced at moderate to high doses under psychedelics such as LSD, psilocybin mushrooms, and DMT, and under cannabinoids such as THJ-018, JWH-018, and 5F-PB-22; it also appears under nootropics including aniracetam and coluracetam, and under dissociatives such as dextromethorphan and memantine.

Color enhancement is felt as a perceptual brightening of the visual field: colors appear more saturated, more distinct from one another, and more present. Reds deepen, greens intensify, and subtle gradients within what seemed uniform surfaces become legible.

The effect draws attention inward — once noticed it is difficult to ignore, and sustained looking deepens it. At higher doses, particularly under psychedelics, colors may appear to glow or radiate, lending the entire visual environment a quality of heightened vividness.

Color enhancement arises through different pathways depending on the drug class:

• Psychedelics — act on 5-HT2A receptors in visual cortex, amplifying thalamocortical signal gain and increasing the salience of color information.
• Nootropics — coluracetam acts on high-affinity choline uptake systems; others modulate AMPA receptors, raising cortical excitability and perceptual acuity.
• Cannabinoids — act on CB1 receptors distributed across visual processing areas, altering the gain of incoming sensory signals.
• Dissociatives — block NMDA receptors, disinhibiting sensory cortex and intensifying bottom-up visual input.

How much each pathway contributes in a given case is not fully understood.

Who experiences it, and how strongly, varies widely. The effect is dose-proportional — negligible at low doses and more pronounced as dose rises. Bright or visually rich environments give it more material, and an open, attentive mindset amplifies it.

Prior experience with psychedelics or cannabinoids may lower the threshold at which it is noticed. Expectation is self-reinforcing — going in anticipating vivid color heightens awareness of it. Dim lighting and inattention tend to reduce its apparent intensity.