Here you will find examples of how to use AKVIS Coloriage.
The program lets colorizing B&W photos and replacing colors in color images. It's also useful for selective desaturation and selective colorization of areas on a color photo.
Just indicate the desired colors by the stroke of the brush; the program does the rest of the work: recognizes the object's border and tailors the new color to the grayscale tones of the initial picture.