Dark themes galore!

Almost all applications have bright white backgrounds. Sure, it looks nice, but depending on ambient light, it can hurt the eyes a wee bit.

Image from AskUbuntu

Enter dark themes:

There are dark themes for Ubuntu.

Dark themes for Chrome.

Dark themes for Firefox.

For Libre Office.

For Netbeans.

And very likely for any other application you want. You just have to search for "Dark themes for xyz".

I'm even changing the background of my blog to be a shade darker than the bright white it currently is.

ps: Before installing third-party themes and add-on's, it helps to check if they are safe to install. Just in case any of them are used for spying on your data.