Pick a Color, Any Color (IMAGE) Washington University in St. Louis Caption Green plants rely on two pigments, chlorophylls a and b, to absorb the energy in sunlight. By thoroughly investigating the chlorophylls a small group of chemists have learned how to modify pigments to absorb anywhere along the solar spectrum. Credit Amy Brown's Kindergarten class. Used with permission. Usage Restrictions please credit 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.