A browsing tip: In Firefox, you can right-click on low-contrast text, select 'Inspect (Q)', and a thing will pop up showing all of the attributes of the text. You can uncheck the 'color' styles to restore a good text color, the filter at the top of the list helps find the 'color' entries. For some reason everyone loves grey-on-grey these days, so I find I'm doing this a lot.

I've been thinking of writing a Firefox extension to auto-detect the page background color and set the text color to the polar opposite of that. Haven't done it yet, but I'm getting close.