Using Stylish extension, you can have the following style on a web site, which colour palette is too bizarre for your eyesight:
<br />
/* Black on white */<br />
html, body, * {<br />
background: #FFF !important; color: #000 !important; background-image: none !important;<br />
}<br />This is just a basic example, you might want to refine it to suit your needs. Possible options: change the appearance of visited links by changing the style of
a:visiteddisplay:noneimg