Colby received her J.D. from Northwestern University School of Law, where she served on the executive boards for the ACLU, Public Interest Law Group, Black Law Students Association, and Student Funded Public Interest Fellowship Program. While at Northwestern, Colby participated in the Children and Family Justice Center in the Bluhm Legal Clinic. She also worked as a summer law clerk at the Public Defender Service for the District of Columbia and completed an intensive semester as a law clerk at the Office of the Cook County Public Defender during her 3L year. Prior to law school, she worked as Legislative Aid in the Massachusetts State Senate. Colby received her B.A. in Political Science and B.A. in Child Development from Tufts University.