How to color a ring chart nicely

Quick answer：

To color a ring chart nicely, consider using a color scheme that contrasts well with each other and reflects the data being presented. You can use a gradient for a smooth transition of colors, or a set of distinct colors for different data segments. Ensure that the colors are legible and not too harsh on the eyes. You may also consider the color blindness accessibility to make the chart understandable for a wider audience.