Create a SmartArt graphic from scratch - Microsoft Support
https://support.microsoft.com/en-us/office/create-a-smartart-graphic-from-scratch-fac94c93-500b-4a0a-97af-124040594842
webClick your SmartArt graphic. Under SmartArt Tools, on the Design tab, in the SmartArt Styles group, click Change Colors. If you don't see the SmartArt Tools or Design tabs, make sure that you've selected a SmartArt graphic. You may have to double-click the SmartArt graphic to open the Design tab. Click the color variation that you want.
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