Multi-colored toner cartridges sit in a printer. Black, magenta, cyan, and yellow can be used together to make a variety of colors. Simply hit print and your document will be delivered in the colors you desire.
Many people prefer color laser printers over inkjet printers because they produce high quality prints quickly. This photo shows a large white photo printer opened up to show the cyan, magenta, and yellow cartridges that are used to create color prints.