It becomes an accessibility problem, because the contrast is too low, and not all eyeballs are the same. Low contrast combined with a thin font makes it very difficult to read.

The problem isn't the colour choice for the font. The problem is with the colour choice of the background combined with the weight of the font and a thin-stroked sans font.

It's hard to read for many people.

There are actually methods available to set your screen brightness correctly.

I love the site. However I susepct that font width would look much better on my high-res Surface than on my 1440p monitor.