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There is also a panel called swatches. You can use the swatches panel to change the color of the color fill and the color of the stroke. The Swatches panel is located on the right side of your screen. If the swatches panel is not opened, you can go to the top of your window and click Window > Swatches. That will open the swatches panel. To use a swatch color, click the shape, and then click the color that you want to apply to it.
To apply a swatch color to the stroke or border, you will need to click the stroke box in the left toolbar one time. Then click a color in the swatch panel. To use is for the color fill, you will need to click the top box one time in the toolbar on the left. Then you can click the color in the swatches that you want to apply to the shape.