Colors for 8-inch letters on a School Bus sign and background?

• A. White letters on Yellow background
• B. Black letters on Red background
• C. School bus yellow letters on Black background
• D. Black letters on School Bus Yellow background

Answer: (D)

Clear, quick recognition at a distance depends on strong contrast between text and background. The brightest, attention-grabbing backdrop for a school bus sign is School Bus Yellow, which is the color most associated with buses and safety. Pairing that yellow with black letters gives the highest contrast, making the 8-inch letters easily readable from far away and in different lighting conditions. White letters on yellow are less legible because white doesn’t contrast as sharply with yellow, and black on red isn’t as effective for quick recognition. So the combination of black letters on a School Bus Yellow background provides the best visibility and is the standard choice.