HP printer not printing color error generally occurs due to a printer is set up to print at “Greyscale” mode which results in a black and white printout. Hence you should reset your printer to “default” mode, which will turn on the color printing mode. HP Printer comes with a built-in cleaning function before that ensure ink cartridges to be fine with ink-filled within and pages inserted in printing tray. Now you need to press “Setup” and then click “Tool” and then press “ Clean Cartridges”. Performing these steps will surely rectify the HP printer not printing color issue.