Colorado law is set up to acknowledge both parents rights but primary consideration is the best interest of the child. There is some discretion for the judge, but it seems that both you and your wife want to deny visitation, and their lifestyle is a big negative against them.

The variable will be how much have they been involved with your son in the past, what are his wishes, and based on that, if the judge feels it would hurt his development to be deprived of them or if it would be a danger to him to be around them.

I’m not an expert but I when I was reading divorce laws here in Colorado in my own experience, it says the grandparents basically have no rights to visitation in Colorado, but will be granted visitation based only on the childs welfare, based on the factors I already listed above.