1. A method for removing at least one unwanted form color content from scanned image data for a document, the method comprising: a) obtaining the scanned document image data in a color data format; b) segmenting the image data into two or more tiles; c) classifying each tile into at least first and second sets according to its combination of background and color content; d) identifying a background color from the first set of tiles; e) identifying at least one form color from the second set of tiles; and f) applying a transform that shifts form color image data values toward background color values.