to black; in an RGB document, "black" always equals RGB value (0, 0, 0). Another reason to use rich black for small areas of black is to avoid trapping issues. Rich black is often used for text printed over a picture or colored background, because otherwise any slight mis-registration between printing plates would produce a white or colored halo around the text, making it much harder to read. References External links Rich black versus plain black - Printernational Shades of gray Graphic design Printing terminology rich_black