High Contrast

Make web pages easier to read by changing or inverting the color scheme.

High Contrast lets you browse the web with your choice of several high-contrast color filters designed to make it easier to read text.

When you install this extension, all pages are "inverted", so black becomes white and white becomes black. Press the extension's icon in the toolbar to toggle it on and off, or customize your settings on a per-site basis.

Other color-changing extensions break many popular websites.  This extension uses filters to invert colors which does not break the site and can be toggled on or off.