For even colour: Dr. Hauschka Eyeshadow Blender Brush.

Our Eyeshadow Blender Brush is a large, rounded brush created especially for the even blending and application of eyeshadow. With this brush, you can easily pick up eyeshadow from the palette and spread it over the entire lid. When using several colours, a lighter colour is recommended as a base colour. The clean eyeshadow brush can then be used to gently blend the colour transitions and achieve subtle gradations.