Fabbaloo recently wrote a couple articles on their tests of the Carima CMYK resins. Unlike other 3D printing resins, this one allows you to mix any color you like, just like the regular 2D printing process. The company also states that these resins are non-toxic too, so they’re suitable for a wide range of applications.

https://www.fabbaloo.com/news/hands-on-with-carima-cmyk-non-toxic-3d-printer-resin-part-1
https://carima.com/