Purkinje Effect ➶

The Purkinje effect or Purkinje phenomenon is the tendency for the peak luminance sensitivity of the eye to shift toward the blue end of the color spectrum at low illumination levels as part of dark adaptation.In consequence, reds will appear darker relative to other colors as light levels decrease.

User Sharlin, in the HN discussion:

Blue LEDs are so utterly annoying in the dark because even though human color vision is by far the least sensitive to blue light, in the dark the situation is reversed.

✶ Thursday, 6 April 2023

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