Which color represents extreme danger?

• A. Green
• B. Yellow
• C. Black
• D. Red

Answer: (C)

Colors in hazard signaling are all about conveying risk quickly, with intensity rising as the color becomes darker and more striking. In this scheme, Black is used to denote the highest level of risk—extreme danger—so it’s the strongest immediate warning you can see. Green usually means safe or go, Yellow signals caution, and Red marks the presence of danger, but the peak level here is represented by Black. Keep in mind that color codes can vary by field, so always check the specific standard you’re studying.