PerRendererData Color property does not change in Image UI

Hi. I can change the texture in the Image UI component but can not set the color.

Code (CSharp):

1. Properties
2.     {
3.         [PerRendererData] _MainTex ("Texture", 2D) = "white" {}
4.         [PerRendererData] _Color("Color",Color)=(1.0,1.0,1.0,1.0)
5. }