A 10-color pie chart color scheme is designed to effectively differentiate between ten distinct segments or categories on a pie chart. It should use contrasting colors to ensure clarity and readability. Common practices include using a color wheel to select colors that are not too close to each other in hue, and avoiding colors that are too similar in brightness or saturation. For a professional and visually appealing chart, one might consider a combination of warm and cool colors, or using a gradient or a sequential color scheme that conveys a sense of progression or hierarchy.