Pick 3-4 colors that are next to each other on the color wheel. Color the grid with these colors to create a pattern or a design. You can use value variations of these colors. Don't forget to mark the colors you are using on the color wheel.
Pick 2 colors that are opposite of each other on the color wheel. Color the grid. Mark the color wheel.
Choose one of the triadic color schemes. Pick the colors, color the grid, mark the wheel.