Moo0 ImageInColors is a simple freeware utility which lets you easily convert images into the ones in different color tones. It is very easy to use, and you just need to drag and drop files onto this software. This software can be very useful if you are working on designing and wondering about which color tones to choose. You can change the image colors to hue, saturation and brightness.
You can drag and drop jpeg, gif, png, bmp and ico files on to the tool for image color conversion. There is an advanced options which allows you to create variants of images with specified ranges.