Vowel-Color Associations (IMAGE) Radboud University Nijmegen Caption Vowel-color associations in two non-synesthete subjects (left) and in two synesthetes (right). Synesthetes more precisely chose the same color for a particular sound. However, all four participants created groups of sounds that lay close to a particular Dutch vowel, such as "ee" [i:] (upper left), and they all chose lighter colors for "ee" than for "aa" or "oo." General principles for vowel-color associations exist, whether one has synesthesia or not. Credit Mark Dingemanse Radboud University 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.