A ink cartridge or cartridges maybe low, empty or possibly clogged
The printer can't print correctly if it lacks one of the basic colors
First step is to see will if it print a test page
Go to Start, settings, printers. Right click on the printer, properties, print test page.
If that doesn't work there should be a head cleaning option in properties that will make it clean the print heads.
If the ink cartridge is still clogged, saturate a q-tip with alcohol
and lightly rub the print head
If there's still nothing after that then either it's badly clogged, low or out of ink, and needs to be replaced