What color should directional signs, other than automotive traffic signs, be?

Directional signs, other than automotive traffic signs, are typically white with a black panel according to industry standards. This color scheme is designed to provide clear visibility and contrast, making it easy for individuals to read and understand the information being conveyed from a distance.

The use of white for the background ensures high reflectivity and helps in illuminating the signs during low light conditions, while the black panel offers a stark contrast that enhances legibility. This standardization is crucial for ensuring uniformity across various types of signage, which aids in navigation and enhances safety.

The other options present different color combinations that do not align with the established norms for non-automotive directional signage. For example, yellow is often used for warning signs, and red typically signifies prohibition or danger, which can create confusion if used for directional purposes. Blue is generally reserved for informational signs, further illustrating why the established color scheme of white with a black panel is the standard choice for directional signage outside of traffic indications.