If you use a toned canvas, why not mix the paint you are using on the same color surface that you are painting on? See what your color will look like before you apply it to your masterpiece!
• Acid free palette paper
• Smooth mixing surface
• Toned in a neutral grey
• Provides a neutral backdrop on which to view colors
• When using a toned painting support, mixed colors appear on the palette as they will in the painting