Computer screens can be glaringly bright, especially in the dark. Try reducing eye strain by using a dark Windows visual style and web browser theme. You can even give every web page you view a white-text-on-black-background look. High-Contrast Themes You can choose from two types of dark Windows themes: (1) a high-contrast theme which wont look as pretty, but doesnt require any additional software or (2) a third-party theme, for which you need to perform a little hack on Windows to install it.