There are several reasons your HP printer not printing color or another color text. The only way to find the solution is to remove the cartridges and start diagnosing the problem from there. Here are some steps to resolve this issue:-
1. Turn on printer and open lid cover to cartridge compartment. If you are using an HP Photosmart, wait for the cartridges to stop in the middle before removing them. Be careful not to touch the printhead.
2. Next, lift the lever that locks the cartridge container. Remove the cartridge compartment.
3. Your ink cartridges might be okay and new but your print head might be full of gunk and dried inks.
4. To clean, you can ran or dip the container under a warm water to dissolve dried inks.
5. Once cleaned, dry the container with clear tissue or paper.
6. Put it back into the printer and lock into place. Reinstall the ink cartridges and run test print.