Indigos are federally protected, as well as state regulated.

About the guy in Col. he was selling them and that was illegal.

For instance, I can keep hognose within the limits of hunting lic. But cannot sell them. If I produce offspring, I can gift them or kill them off. Its illegal to release them. I can also apply for a holding permit, if I want to keep them in excess of a hunting lic.

I know its hard sometimes to get the FACTs out of state agencies, If I were you, I would discuss this with a non game biologist of LE. As non enforcement is an individual choice and temporary. Which means, get it in writing.