Color suppression can be described as the experience of colours becoming darker, more saturated and harder to distinguish from one another. During this experience, reds may seem “less red”, greens may seem “less green”, etc and all colours will likely have become much vaguer and more subtle to look at than they comparatively would be during everyday sober living. At higher levels, this effect can result in the external environment appearing to be black and white, monochrome, and completely devoid of colour.
Colour suppression is often accompanied by other coinciding effects such as acuity suppression and double vision. It is most commonly induced under the influence of heavy dosages of antipsychotic compounds, such as quetiapine, haloperidol, and risperidone.
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