ISO 7010
ISO 7010 is a technical standard by the International Organization for Standardization for graphical hazard symbols on hazard and safety signs, including those indicating emergency exits. It uses colours and principles set out in ISO 3864 for these symbols, and is intended to provide "safety information that relies as little as possible on the use of words to achieve understanding." The standard was published in October 2003, splitting off from ISO 3864:1984, which set out design standards and colours of safety signage and merging ISO 6309:1987, Fire protection - Safety signs to create a unique and distinct standard for safety symbols.