Just discovered this extension for Chrome. Lets you override a website's CSS with your own custom styling. Never be bothered by low-contrast fonts again!
https://chrome.google.com/webstore/detail/stylebot/oiaejidbmkiecgbjeifoejpgmdaleoha?hl=en
https://chrome.google.com/webstore/detail/stylebot/oiaejidbmkiecgbjeifoejpgmdaleoha?hl=en