That's a tough call, because we don't have any information about how your computer is setup or even what model of printer you have. We can try our best guess, but there's a better way. Here's what I would do (and have done) when I am in your place.
Open the search engine of your choice. I prefer Google (sorry Microsoft!) and use this as your search term:
"manufacturer-name model-number does not print in color"
Use the manufacturer and model number of your printer, and omit the quotes.
From the search results, choose the results that come from the website of your printer manufacturer.
Alternate strategy - I have also done this myself:
Go directly to the website of the printer manufacturer. (Use a search engine to help find it.) Once you're at the manufacturer's website, search for your exact printer model number. Once you get to that page, look for a link that says Support or Help or Contact Us. That's where you'll find the information you need to get back to printing in color.
Bonus strategy - this is my secret weapon.
Open that search engine again and this time use this as your search term:
"manufacturer-name user help forum"
Once again, substitute the name of your printer manufacturer, and omit the quotes.
If you're lucky, you'll find a link to the community help forum for your printer manufacturer, where you can correspond directly with people who are using the same printer as you!
I like these strategies because they empower me to find the information I need. Best of success to you.