I noticed a bit of "fuzz" that seemed out of place as well.

Turns out that the body tag has:

  -webkit-font-smoothing: antialiased;

This greatly reduces the contrast on a dark background in my opinion.

Here's a screenshot to show off the difference with the top being the current site, and the bottom being what it looks like without that CSS:

https://i.imgur.com/3UOIOWL.png