Color indicators are visual cues that use different colors to convey information quickly and effectively. They are commonly used in various fields, such as traffic lights, where red means stop, yellow means caution, and green means go. These colors help people make decisions at a glance, enhancing safety and efficiency. In addition to traffic signals, color indicators are also found in areas like healthcare, where red might indicate a critical condition, while green signifies stability. Similarly, in data visualization, colors can represent different categories or levels of importance, making complex information easier to understand at a glance.