Viburnum tinus (IMAGE) University of Cambridge Caption Viburnum tinus owes the dazzling blue colour of its fruit to fat in its cellular structure, the first time this type of colour production has been observed in nature. Credit Rox Middleton 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.