The following checklist on the uses of color coding and signs, if checked “okay,” gives a measure of guidance concerning the adequacy of safety signs and visual clues in your operation: Is red used as the basic color to indicate fire, danger, or stop, on emergency stop bars or buttons and fire quenching materials? Is orange used as the basic color to indicate dangerous parts of machines and energized equipment, such as on the inside of movable guards and exposed edges of pulleys or gears?