The Contrast Rebellion
contrastrebellion.com
contrastrebellion.com
One topic of conversation in the house is how the dynamic range of prints (say Inkjet) interacts with the viewing conditions.
For instance if is relatively dark and you are far away from the print it makes sense to lighten the dark areas so you can see more in them. Under good viewing conditions though the original looks better.
It is like gamma correction but it applies to prints and not just screens.
That article is missing the important thing which is knowing how to pick contrasting shades algorithmically, even if you never look at them. The accessibility guidelines for contrast are half of the knowledge, the other is knowing that contrast ratios are defined in terms of the L in the Lab color scheme.
The WCAG 2 contrast guidelines are defined using relative luminance "Y", as in CIE XYZ, and not absolute luminance "L", even though they use the letter L somewhat incorrectly (not to mention incorrect math, but that's another story for another day). The 1.4.3 guidelines are not LAB which is more properly L*a*b*, as L* is perceptual lightness, not luminance.
Interestingly though, the NEW method for WCAG 3 is APCA, which is using power curves very similar to L* perceptual lightness, but nevertheless is not a ratio. APCA is perceptually uniform, the old method is not, leading to a great deal of misunderstanding, and likely a motivating factor behind "Contrast Rebellion"...