If you’ve done an online search for multi-color 3D printers, you’ll have seen a lot of articles that instead show “full color” 3D printers, but these are not the same thing. Multi-color 3D printers do exist, but they’re still something of a rare find. Most people who want to 3D print in multi-color simply place a multi-colored spool of filament in a regular FDM 3D printer and hope for the best. But the best way to control exactly when a 3D printer changes spools is to use a dedicated multi-color 3D printer or, at the very least, one that has a double or triple extruder.