1. A method for determining a color value of an article of fabric, comprising: obtaining, from a mobile device, a digital image of an article of fabric with a calibration card; calculating a fabric luminosity value for the article of fabric from the digital image; comparing the fabric luminosity value with calibration luminosity values to create a comparison; determining, based on the comparison, a color value of the article of fabric; and presenting, via a user interface (UI) of the mobile device, a recommendation to improve the color value of the article of fabric, the recommendation based on the determined color value of the article of fabric; wherein the recommendation is based on comparing the color value of the article of fabric with a previous color value of the article of fabric stored in a database to determine if the color value has increased or decreased.