Techniques are described for color management of halftone prints by direct modification of halftone dot perimeters within bi-level, halftoned bitmap images. According to the halftone print color management techniques, border pixels of the halftone dots are spatially selected to be turned on or off in order to appropriately shrink or grow the halftone dots. The bitmap image may be prepared to create both a halftone proof and printing plates. Therefore, contrary to conventional continuous-tone color management techniques, direct halftone bitmap modification minimizes dot structure differences between data used to produce a proof and corresponding printing plates. The perimeter of a halftone dot within a bitmap image is modified by applying a local threshold value to a distance mapped bitmap image. The bitmap image may be bipolar distance mapped (BDM) to allow for shrinking or growing of the halftone dots by varying a threshold value.