If you want to print colour, you need a colour enlarger. It has cyan, magenta and yellow filters that slide in and out of the light path between bulb and diffusion box when you turn knobs on the head, thereby changing the colour. You need the ability to nearly-infinitely vary the filter colour in order to get the colour balance of the print correct.
Colour enlargers are as common as B&W enlargers in my experience and you can generally pick one up (in a Western country like US/EU/AU) for $0-$150 depending on size, condition and which lens might be included. You can probably find someone throwing one out if you look in local classifieds.