Colorado Revised Statutes Ann. § 16-7-202(1)

(1) If the offense charged is a felony or a class 1 misdemeanor or if the maximum penalty for the offense charged is more than one year's imprisonment, the defendant must be personally present for arraignment; except that the court, for good cause shown, may accept a plea of not guilty made by an attorney representing the defendant without requiring the defendant to be personally present. In all prosecutions for lesser offenses, the defendant may appear by his or her attorney who may enter a plea on his or her behalf. If the defendant appears personally for a charge that is not in title 42, C.R.S., the court may advise the defendant of the possibility that restorative justice practices may be part of a sentence, if available in the jurisdiction and requested by the victim who has been informed about the restorative justice practices pursuant to section 24-4.1-303(11)(g), C.R.S.