What color is used to define the floors of controlled airspace at 700ft above the ground on a chart?

The color magenta is used to define the floors of controlled airspace at 700 feet above the ground on aeronautical charts. This color coding is part of the standardized system used to help pilots easily identify different airspace classes and their boundaries.

In the context of charts, magenta typically indicates controlled airspace that begins at a specific altitude, in this case, 700 feet, and distinguishes it from other types of airspace that may have different designations or requirements. This is important for maintaining situational awareness and ensuring compliance with aviation regulations. Understanding these color codes is crucial for pilots when navigating in controlled environments and helps enhance safety in the airspace system.