I have used multiple contrast checkers that conform to various W3 standards - here, here and here.
Why does this matter to me? Because considering this is a wiki, it would be nice to be able to be able to see links to other pages. At the moment, all I see is light text on a dark background. There just is not enough contrast for me to tell the difference between links and normal text without manually hovering my cursor over every word.
I consider my eyesight to be quite good, and I have calibrated my monitor enough times to know that it isn't a problem at my end.
While I love the darker background, I just don't think it is going to work contrast-wise.