Old-Style, Traditional 3-D Rainbow Model (IMAGE) Harvard University Caption Rainbow color schemes are very common in scientific visualizations, despite the well documented fact that the coloring is not well attuned to the human visual system. Researchers at Harvard have shown that a gradient from black to red is more effective for diagnosing heart disease in visualizations of arteries. Credit Michelle Borkin 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.