Hi Marcia.
1
Check the ink levels in your printer to ensure all the color cartridges have ink.
If there is enough ink, try printing out a test page form the panel on your printer to check if that prints in color.
2
If that was not the problem, open the Settings App.
Go to Bluetooth and Devices - Printer and Scanners.
Select your printer.
On the next window, check the Printing Preferences and Printing Properties settings to ensure your printer is not set to print in Black and White (Grayscale).
3
If that was not the problem, the best option is to completely uninstall your printer, restart your PC, then go to the support page for your printer on the manufacturers website to download and reinstall the version of drivers, firmware and associated software they provide for your printer model.
If you have any difficulty locating that support page, what is the make and exact model number of your printer.