It looks so cool that,we can print a model with multiple color.There are some ways to achieve it,one of the soultuions are displayed below.
We can just make the printer paused when we need a color in new layer
,in which time we can add new color filament in,replace the old one,so that we have a model printed with multiple color.
Or you can add magnets and other accessories to the model when you pause it.