Abstract: This invention relates to an apparatus and method for real-time testing of television picture colors. It can conduct real-time testing and adjusting of colors at various pixels to make tree and grass greener. The apparatus in accordance with the present invention includes a chromatic-coordinate testing circuit and a chromatic-coordinate bias circuit for each set color and configuring them between the television signal output and the video-driving amplifier. The pixel identified by the chromatic-coordinate testing circuit is the pixel to be adjusted. The chromatic-coordinate bias circuit controls and changes the bias current or bias voltage output to the video-driving amplifier in color television sets so that the connected three-color electron gun produces color bias effects on the monitor screen.