What color should NOT be used for a Stop/Off push button?

In the context of electrical controls and safety, the color red is commonly associated with stop functions or emergency situations. It is universally recognized as a "stop" signal in various industries. This makes red the appropriate color for a Stop/Off push button, as it provides a clear and immediate visual cue for operators to halt operations or respond to emergencies.

Yellow is often used to indicate caution, signaling operators to be alert, while blue can denote information or control settings that don't interfere with safety functions. Green typically represents a "go" signal or a state of operation, encouraging action rather than stopping. Therefore, using green for a Stop/Off push button can create confusion, as it contradicts the expected safety-oriented signals. This is why green is not an appropriate choice for a Stop/Off push button, as it fails to communicate the critical function it is meant to serve effectively.