The correct name is "Health First Colorado". I signed up the day I was hurt, they backdated the signup to the month prior. It took less than 15 minutes to become covered.
I've been working for 20+ years, with spats of insured or not-insured throughout... mostly uninsured. After I left my SF gig, I gave up my insurance & didn't get any more since I'd already had 6 months for the year.
By the end of December, I needed it.
Edit - link: https://www.colorado.gov/hcpf/colorado-medicaid