In Colorado, the age of consent for sexual activity is 17 years old. Like many other states, where a minor is concerned, the age difference between the two parties becomes a big focus.
In Colorado, a person who is under 15 can legally consent to have sex with someone who is no more than 4 years older.
Additionally, a person under 17 can legally consent to sex with a person who is no more than 10 years older. This is quite a liberal age difference, particularly when compared to other states.