Yes, a prenuptial agreement can be modified after marriage in Colorado. Such changes must be agreed upon by both parties and put into writing. This is referred to as a “postnuptial” agreement, which like a prenuptial agreement, outlines the terms regarding assets, debts, and other matters during the marriage. It’s essential to have legal counsel involved in this process to ensure the agreement complies with all legal requirements and adequately reflects the new terms agreed upon by the spouses. For more detailed information, consulting with a local family law attorney would be beneficial.