1. A computer-implemented method of altering the component colors of an art work associated with a drawing stroke in an electronic document, a component color of an art work being a color of one or more components of the art work, the method comprising: converting each component color of the art work into a color space of a drawing stroke color; transforming each component color of the art work to a new color based upon the difference between a key color of the art work and the drawing stroke color; and replacing each component color of the art work with the new color.