There are a few ways to change the color of an artboard in Illustrator. The first way is to use the Colors palette. To open the Colors palette, click on the Palette button in the bottom left corner of Illustrator. Then, select a color from the Colors palette and press OK. The second way is to use the Properties palette. To open the Properties palette, click on the Palette button in the bottom left corner of Illustrator. Then, select a property from the Properties palette and press OK.