1. A computerized method for determining a whiteness score for a user's teeth comprising: a) at a computing device, identifying a plurality of pixels from an image that show a portion of the user's teeth; b) at the computing device, determining an average pixel value for the plurality of pixels; c) at the computing device, determining a plurality of color values for the average pixel; d) at the computing device, evaluating the plurality of color values to generate the whiteness score for the average pixel; and e) at the computing device, displaying the whiteness score.