Color-Coded Sandwich Labels (IMAGE) Massachusetts General Hospital Caption In the Massachusetts General Hospital cafeteria, color-coded labels indicated the healthiest sandwich choices (green), along with those designated less (yellow) and least (red) healthy. Credit Mass. General Hospital Nutrition and Food Service 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.