Identification of paint color: color identification, application of color theory knowledge and color discrimination ability and method can accurately determine the color of the desired color. Identify the paint color, we must first find the name of the paint color on the standard color card, color under the standard color card or standard in sufficient brightness of the sun or the standard light source, identify the main color of the paint color, as well as the main color is what kinds of color mixing, color, basic proportion of primary and secondary order of mixing the hue, brightness and purity and combination. We should distinguish with primary color, color, color, color and hue, color mixing achromatic lightness and purity assessment. If there is a mistake, it is difficult to allocate the required standard color.