If you have an HP printer not printing color , there are three possible causes. Before you go any further with printer troubleshooting, double-check all of these cases, this will might help you fix your printer that is not functioning properly because of a simple error and can be fixed in one step. Color Printing function disabled : To print in color, go to HP printer properties and enable the color printing feature. Driver Conflict : If you were utilizing multiple printers on the same system, there was a chance that the drivers for the devices may conflict. Clogged Print head : If you haven't cleaned the print head on your HP printer in a long time, the HP printer will not print in color.