Colorado is called a “no fault” state, which means that you don’t have to explain to the court the reason behind your divorce, only that the marriage is “irretrievably broken”.   In the past, if a spouse wanted a divorce, he or she had to prove that the other spouse had a reason for divorce—such as adultery, abandonment, or dangerous behavior. . This “no fault” approach to divorce matters is considered to lead to more fair and reasonable outcomes for each spouse