Certain color hues are more easily distinguished by the human eye than others
Empirical studies mapping human color vision and discrimination thresholds confirm that visual sensitivity varies across the color spectrum, making certain color hues more easily distinguished than others.
The claim states that certain color hues are more easily distinguished by the human eye than others. Retrieved papers examining human color discrimination thresholds (such as papers [1], [7], and [9]) consistently demonstrate that chromatic sensitivity and discrimination thresholds vary smoothly and anisotropically across stimulus space, supporting the proposition that some color differences are more readily perceived than others.
Fangfang Hong, Ruby Bouhassira, Jason K. Chow, Craig Sanders, Michael Shvartsman, Phillip Guan, Alex Williams, D. Brainard. Comprehensive characterization of human color discrimination thresholds. 2026. https://doi.org/10.1101/2025.07.16.665219
Comprehensive characterization of human color discrimination thresholds shows that internal noise varies across stimulus space, meaning certain color differences are more easily detected than others.
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Fangfang Hong, Ruby Bouhassira, Jason Chow, Craig Sanders, Michael Shvartsman, Phillip Guan, Alex H Williams, David H Brainard. Comprehensive characterization of human color discrimination thresholds.. 2026. https://doi.org/10.7554/eLife.108943
Using psychophysical modeling, researchers mapped human color discrimination thresholds and confirmed variability in sensitivity across stimulus space.
A B Poirson, B A Wandell. Task-dependent color discrimination.. 1990. https://doi.org/10.1364/josaa.7.000776
Color discrimination thresholds evaluated across different tasks demonstrate ellipsoidal isosensitivity contours indicating varying relative sensitivity depending on chromatic properties.
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