Hair pigmentation patterns (IMAGE) Columbia University Irving Medical Center Caption Hair pigmentation patterns of 100 hairs from a male and female study participant. Darker hair colors represented in red; lighter in blue. Credit Image from Rosenberg et al. (2021) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.