What color represents airports with control towers on sectional charts?

On sectional charts, airports with control towers are represented by a blue symbol. This color coding helps pilots quickly identify which airports have the infrastructure and personnel in place to provide air traffic control services. The blue representation ensures that the information is clear and easily distinguishable from other types of airports, such as those without control towers, which are depicted in a different color. This differentiation is vital for flight planning and navigation, allowing pilots to make informed decisions regarding takeoffs, landings, and airspace usage.