What color is used to highlight Class E airspace lower floors near airports on sectional charts?

Class E airspace lower floors near airports are highlighted in magenta on sectional charts. This color coding is specifically used to denote the beginning of controlled airspace where visibility and cloud clearance requirements become applicable, helping pilots easily identify where they transition from uncontrolled to controlled airspace. Understanding this visual cue is essential for pilots to ensure they maintain compliance with airspace regulations, especially in areas with significant traffic or complex airspace layouts. The use of magenta supports quick recognition during flight planning and navigation, enhancing situational awareness for pilots operating near busy airports.