Unity Vertex Color Shader

Shader "Custom/VertexColorShader" {
    Properties {
        _Color ("Color", Color) = (1,1,1,1)
    }
    SubShader {
        Tags {"Queue"="Transparent" "RenderType"="Opaque"}
        LOD 100

        Pass {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"

            struct appdata {
                float4 vertex : POSITION;
                float4 color : COLOR;
            };

            struct v2f {
                float4 vertex : SV_POSITION;
                float4 color : COLOR;
            };

            float4 _Color;

            v2f vert (appdata v) {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.color = v.color * _Color;
                return o;
            }

            fixed4 frag (v2f i) : SV_Target {
                return i.color;
            }
            ENDCG
        }
    }
    FallBack "Diffuse"
}