Get Vertex Color from Texture

Unity Engine
1

Hey guys!
Newbie here, have a question.

I need to check if a vertex is a certain color by getting its color from its main texture.

This is what i’m trying to do:

fixed4 tex = tex2Dlod (_MainTex, float4(v.texcoord.xy,0,0)); // Doesn’t return the right color

Any help would be appreciated!

2

For some more context: This is my code

void vert( inout appdata_full v )
        {     
            #if !defined(SHADER_API_OPENGL)
            float4 tex = tex2Dlod (_MainTex, float4(v.texcoord.xy, 0, 0));
            #endif
                     
            bool test = (tex.r == _ColorT.r)? true:false;
                         
        }

In the editor, i change the R value of ColorT. No matter what value i use, the test bool is never true.