1. A method for color correcting a predetermined portion of a color image, said color image comprising a plurality of pixels and a plurality of color information channels for each of said plurality of pixels, said method comprising the steps of: selecting in said predetermined portion a first input reference color of a first pixel and a corresponding first desired output color of the first pixel; selecting in said predetermined portion a second input reference color of a second pixel and a corresponding second desired output color of the second pixel; defining a linear color transformation for each color information channel based on the input reference colors and the desired output colors; applying said linear color transformation to all pixels in said predetermined portion; and displaying the color image.