Algal Pigments All photosynthesizing plants have certain pigments in them by which they capture sunlight. All plants have in common the photosynthetic pigment of chlorophyll, but the other accessory pigments as different. These accessory pigments can be the same between two red algae, or two green algae. In this lab a red, green and brown algae will be used to extract the photosynthetic pigments from. We will also be extracting the photosynthetic pigments from Coleus sp., which is a red