Which color represents the BART system's Richmond Line on maps?

The Richmond Line of the BART system is represented by the color yellow on maps. This color coding is crucial for easy navigation and understanding of the transit system. By using a distinct color, passengers can quickly identify the line they need to take, reducing confusion and improving the overall transit experience.

In public transit systems like BART, each line is assigned a specific color to help riders recognize their route visually. Understanding this color-coding is essential for effective travel planning and can significantly enhance the user experience when navigating the BART network.

The other options do not apply to the Richmond Line, as they represent different lines or services within the BART system, further emphasizing the importance of color distinctions in facilitating smooth travel.