What color are guide signs typically?

Guide signs are typically colored blue, black, or green to provide information regarding directions, services, and points of interest.

The green color indicates general guidance for directions or destinations, such as interstates and highways, while blue signs are often used to indicate services such as rest areas, gas stations, and food options along the roadway. Black is sometimes utilized for specific types of information that are displayed in a contrasting manner to enhance visibility and clarity.

This color coding helps drivers quickly identify the type of information being presented, which is essential for safe navigation and an efficient driving experience. The other combinations of colors mentioned do not align with the standards typically used for guide signs.