The best color for stencils is White. It is always better to use a lighter color, preferably white, so that stronger colors stand out. Use a dark color, if you are doing a dark stencil and a light color, if you are doing a light stencil. You can use black as a base color if you want to highlight the design on a dark background. If you use a dark base color, then you cannot see the design on a dark background. Similarly, if you use a light base color, then you cannot see the design on a light background. Stencils are available in a variety of colors, like red, orange, green, blue, purple, black, yellow and more. Your color choice depends on what you are doing. For example, if you are printing a stencil for a T-shirt, then you can use a dark color, as the T-shirt will be black. On the other hand, if you are painting a stencil for your car, then you need to use a light color, as cars are generally white.