It depends on how you use your base and the type of makeup looks you prefer. A basic nude-colored base can work with and help intensify eyeshadow of any color, so it might be all you need.However, if you prefer a more dramatic look, you might also want a white and/or black base for certain eye looks. If you experiment with a wide range of eye looks, you might even want a few eyeshadow bases in specific colors, such as purple or pink.