Grapes and blueberries have no blue color pigments. Tiny structures in the wax coating give them their color.
The wax layer has various functions that have not yet been fully developed. The group now wants to continue research and look for ways to recreate the coating and make it usable. ani ani.com: Do you know why blueberries are blue? If so, please email jennifer.smith@mailonline.co.uk. For more information, go to www.scienceadvances.com.