Tint the visible parts of an Additive texture

Hi I am trying to Jessy's Additive texture for my shadow texture in iOS. It is additively blending out the black areas of my texture but I would like to somehow tint whatever remains visible to black as well. Can someone help me with the shader?

thanks!

Jessy's shader is as follows:

Shader "Additive Texture" { Properties { _MainTex ("Texture", 2D) = "" } SubShader { Tags {Queue = Transparent} Blend One One ZWrite Off Pass { SetTexture[_MainTex] } } }