Multicolor Cross Shape (IMAGE) Optica Caption By adjusting the number of layers of multicolor resins, the researchers could adjust the light absorbance for each part of a structure. This allowed them to create black in microstructures such as this cross shape by combining layers of red, blue, green and yellow. Credit Shoji Maruo, Yokohama National 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.