Rainbow Folders is a simple, neat and handy freeware that helps you customize the appearance of your folder icons, mainly by letting you assign to them any color you want. Their visual style can also be toggled among classical (Windows 9x-looking icons), typical (folder icons in the style of Windows XP ones), and modern (Windows Vista-like icons). Therefore, you can make any of your folder icons look like Windows 98 icons on your Windows 7 system, and not only change their colors from the well-known yellow to any color you can think of.
Rainbow Folders is very easy to use, as it can also be accessed from the context menu (right-click menu) of your folders in Windows Explorer. Its interface is simple and straightforward, allowing even complete beginners to easily change the look of their folder icons as they like.
Even though it’s very simple, small, neat, and also free, this nice tool gets its job done. I like its preview function a lot, as well as the fact that it allows selecting interesting colors just by controlling the “Hue” and “Saturation” sliders. A cool “Random” button and a handy list of favorite colors are also available. In conclusion, though it’s free, small, and very simple, it also is one of the best tools you can find if you want to quickly and effortlessly change the look of your folder icons.