To change the Canvas color (The area outside of a document’s boundaries), Right-clicking anywhere on the canvas and select any shade of gray that you like (from Black to Light Gray). To select any other color choose “Select Custom Color…“.
You can then select any color that you want from the Color Picker that pops up. Remember that the color you choose will affect how you see other colors, so it’s a good idea to stick with grays or black in most cases.
