Which statement about visual response signal colors is correct?

• A. Red, blue, green, amber
• B. Red, blue, green, amber, clear
• C. Red, blue, yellow, amber
• D. Red, blue, green, amber, clear, (sometimes state dependent)

Answer: (D)

Visual response signal colors vary by jurisdiction, and a complete description should reflect both common colors and that states can require different setups. The statement that lists red, blue, green, amber, and clear, with a note that it can be state dependent, best captures how agencies commonly use multiple colors to convey different signals while also acknowledging that some colors or rules may differ from one state to another. Red and blue are widely recognized as primary emergency indicators, amber is commonly used for caution or directing traffic, green appears in some places for specific roles such as incident command or EMS signaling, and clear can be used in certain configurations or as a neutral option depending on local regulations. Since laws and acceptability of colors can change by state, noting state dependence keeps the description accurate across jurisdictions. Other options fall short by omitting a color or by implying a fixed set that doesn’t accommodate regulatory variation.