1. A soft proof user interface comprising: a display module to display: a visual representation of a print product; and a color array expressing a tolerance range of a color component of the visual representation and a target color within the range; a manager including: a visualization function to produce the visual representation and the color array according to a soft proof array; and a tolerance selection function associated with the display to enable selection of the tolerance range for at least a portion of the print product, wherein the selected tolerance range is expressed on the display in the visual representation and in the color array, and wherein the selected tolerance range is stored as a portion of the soft proof array.