People report colour vision even at very low light intensities
Scientific studies and reviews confirm that human observers can report color vision and hue perception even under very low, scotopic light intensities.
The claim is specific and empirical. Multiple papers, including direct psychophysical investigations and contemporary reviews, explicitly document that color perception can occur under scotopic (low light) conditions mediated by rod activity.
Andrew J. Zele, Dingcai Cao. Vision under mesopic and scotopic illumination. 2015. https://doi.org/10.3389/fpsyg.2014.01594
Reviews evidence demonstrating that hue perception is indeed possible under scotopic, rod-mediated conditions.
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Ulf Stabell, Bjørn Stabell. COLOR THRESHOLD MEASUREMENTS IN SCOTOPIC VISION: <i>Simultaneous color contrast</i>. 1968. https://doi.org/10.1111/j.1467-9450.1968.tb00526.x
Demonstrates that color may be observed well below the break-point level of dark adaptation, suggesting rod-driven color responses.
Ulf Stabell, Bjørn Stabell. COLOR THRESHOLD MEASUREMENTS IN SCOTOPIC VISION: <i>Test‐stimulation varied</i>. 1968. https://doi.org/10.1111/j.1467-9450.1968.tb00525.x
Confirms that color thresholds follow rod dark adaptation curves, indicating a color-related process initiated by rods at low intensities.
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