Now that you have an understanding of Color Harmonies, you will need to apply a color harmony to your menu.
You can use any color harmony except monochromatic and shades.
Use Photoshop's color panels to help you choose appropriate harmonies. You can extend your harmony using lighter, darker, brighter, or grayer versions of the hues in your harmony.
To open Photoshop's Color Wheel, go to Window>Extensions>Adobe Color Themes.
To open your Swatches panel, go to Window>Swatches.