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Navigate to Workspace > Project > Project Info & Settings.
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From the Project Color Palette drop-down list, you can pick one of five pre-set color schemes.
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To specify your own palette, select Custom Palette below the pre-set options.
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Specify up to 16 comma-separated hexadecimal values (for example, #00a4e4) for the colors you intend to use. If, for example, you want to use only four values, these colors will automatically be repeated in visualizations that contain more colors.