ColorVeil, as the name suggests, will create color filters on your desktop display.
This unique software will add a color filter to your monitor display. Hence, you can view the - desktop, Internet browser, video player, document, website, or program and everything else that you see through the display in the given color. Everything displayed on the screen will look covered in the chosen color. This application includes features like: the ability to choose a suitable color for your mood, ability to experiment with some colors, support for custom transparencies, display could be dimmed reducing the brightness helping save the battery, you can create screencasts or presentations, ability to add an interesting color filter to the video output, ability to set it up in the stealth mode so that it will vanish from the taskbar, and much more.
It also support: left-click icon in the system tray to toggle the veil, middle-click to set a random color, and right-click to open the settings.