Road signs that indicate services for travelers – things like gas stations, restaurants, hotels, hospitals, campgrounds, rest areas, etc. – are typically blue with white lettering/symbols. These are known as service signs or informational signs.
For example:
On highways, before an exit, you often see blue signs listing “Gas – Food – Lodging” with logos or names of businesses at that exit.
Signs pointing to a hospital are usually blue with a white “H”.
Signs for rest areas are often blue as well (sometimes with white text like “Rest Area – 2 miles”).
Tourist info or attractions sometimes use brown, but specifically for services (gas, food, lodging, phone, hospital, camping), blue is the standard color.
So, if you see a blue sign, it generally means it’s giving information about available services or facilities.
This color coding is part of the uniform system in the U.S.:
Blue = motorist services guidance (food, gas, lodging, hospitals, etc.).
Green = directional and distance (exits, cities, highways).
Brown = recreational or cultural interest areas.
Red = stop or prohibited.
Yellow = warning.
White (with black) = regulatory.
For the question specifically: service signs are blue with white symbols/text.
