I don't know anything about tattoo laws in Colorado, but here in NC, a minor (under 18) must have parental approval -- at least when the tattoo shop is registered and legitimate. My co-worker's son, who was 16, wanted one, but she wouldn't give her approval. This happened about 10 years ago.
The tattoo on her face looks like it was poorly done (IMO, but I'm certainly no judge of tattoos) -- I know that prisoners can somehow get tattoos in prison, so there must be a way for a non-professional to do one. Maybe some friend of hers was able to do it, or knew someone who could.
I got one at 16 with a fake ID, at a tattoo parlor (or whatever their formal name is - don’t want to offend anyone with my improper tattoo verbiage). But I tend to think she probably knew a tattoo artist or an aspiring tattoo artist who did it for her.