There ARE color filter kits that can be used with a B&W enlarger (these are different from "viewing" filters), but many people find it's PITA to use them. They will contain a set of C, M and Y filters with different densities and you create a "pack" of them. For example, if you need 45M 50Y, which is a typical starting filtration, you use 40M+5M+40Y+10Y pack. This is just an example.

Probably easier to find a used color enlarger. In color printing, you need to adjust the filtration and it's easiest done by just turning a knob...