Hard to tell if this is auto generated but I'd guess so. There's a somewhat egregious error. In the Helmholtz–Kohlrausch effect section the site states"
"The illusion where increased saturation (or chroma) of a color is perceived as an increase in the color's lightness."
But that is notably wrong. Lightness is a tonal metric (closer to white, more lightness) and is defined as such on that site as well.
In the H-K effect, emitted light of greater saturation (less lightness) is perceived as higher luminance (brighter) than emitted light of greater lightness.
A more accurate statement would be "The effect whereby colors of greater saturation than, but equal luminance to, a less saturated reference color are perceived to be of greater luminance that the reference color." (I'm sure that could be tightened up.)
"The illusion where increased saturation (or chroma) of a color is perceived as an increase in the color's lightness."
But that is notably wrong. Lightness is a tonal metric (closer to white, more lightness) and is defined as such on that site as well.
In the H-K effect, emitted light of greater saturation (less lightness) is perceived as higher luminance (brighter) than emitted light of greater lightness.
A more accurate statement would be "The effect whereby colors of greater saturation than, but equal luminance to, a less saturated reference color are perceived to be of greater luminance that the reference color." (I'm sure that could be tightened up.)
A very different thing.