LOTO stands for "Lockout/Tagout," which is a safety procedure used to prevent the unexpected start-up or release of energy during servicing or maintenance of machines or equipment. The color code for LOTO devices such as locks and tags varies depending on the industry and country. In the United States, the Occupational Safety and Health Administration (OSHA) has established a standard color code for LOTO devices, which uses red for the lockout device and yellow for the tagout device. However, other colors may be used in different situations or industries. It is essential to follow the appropriate color code to ensure the effectiveness and safety of the LOTO procedure.