Over the weekend I threw together a quick website that takes user submissions for job listings for companies that are avoiding hiring in Colorado: https://www.coloradoexcluded.com/

Colorado recently passed a law that, amongst other things, requires that companies who are hiring remotely in Colorado to list a salary range for their positions.

While I obviously can't make any guarantee that this is the reason, many companies have started listing job openings that are excluding any Colorado based applicants. You can find more information in the FAQ on the about page: https://www.coloradoexcluded.com/about