There are a few ways to change the color of a canvas in Photoshop. The first way is to use the Colors palette. The Colors palette contains a range of colors that can be used to change the color of a canvas. The second way is to use the Adjustment layers. The Adjustment layers are located in the layers palette, and they allow you to change the brightness, saturation, and lightness of a canvas. Finally, you can use the Image tools to change the color of an image on a canvas.