1. In a computer system, a method for color gradient object tracking enabled as software instructions stored in a computer-readable medium and executable by a processor, the method comprising: illuminating a tracking area with a chromatic light source; measuring a color value, defined by at least three attributes, reflected from an object in the tracking area; accessing a lookup table (LUT) cross-referencing color values to positions in the tracking area; in response to accessing the LUT, determining a presence of the object in the tracking area; and, in response to determining the presence of the object in the tracking area, supplying a real-time feedback signal representing the object position.