Understanding how to use color effectively is essential for creating charts that are both attractive and easy to interpret. Color theory helps you decide which colors work well together, how to draw attention to important data, and how to avoid confusion. In the context of charts, you should aim for a balance: colors should be distinct enough to differentiate data series but harmonious enough to avoid visual clutter. Accessibility is a key consideration—many users may have color vision deficiencies, so it is crucial to choose color palettes that remain readable for everyone. High-contrast combinations, clear labeling, and not relying solely on color to convey meaning all help make your charts more inclusive.