Not A Good Idea: While using Analogous colors that sit next to each other look nice, colors used this way are not very functional. For example, it’s nearly impossible to identify a specific color of a label shown. If using a Legend, how do you easily identify which Label matches which slice?
Or in the example below the slice color of label 3 is lighter than label 2 but darker than label 4 and yet they’re all light green.
A Good Idea: Here a better idea is to use complementary colors that sit opposite each other in the color wheel for more contrast. It doesn’t have to be completely contrasting colors but having a greater range of brightness and darkness of like colors is preferable for contrast.
For more details on colors, see the following link:
Analogous or Complementary colors?
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