Add Vertex Colors To A Shader

Hi everyone,
I am working on a low poly game and I am using a flat-lit shader. The flat lighting works great while allowing shared vertexes. The problem is, this shader does not support vertex colors, which I need to color the terrain I am generating properly. I am not good at writing shaders, but here is the shader I am currently using. How can I add vertex coloring with this shader?

Code (CSharp):

1. Shader "Custom/Flat Wireframe" {
2.  
3.     Properties {
4.         _Color ("Tint", Color) = (1, 1, 1, 1)
5.         _MainTex ("Albedo", 2D) = "white" {}
6.  
7.         [NoScaleOffset] _NormalMap ("Normals", 2D) = "bump" {}
8.         _BumpScale ("Bump Scale", Float) = 1
9.  
10.         [NoScaleOffset] _MetallicMap ("Metallic", 2D) = "white" {}
11.         [Gamma] _Metallic ("Metallic", Range(0, 1)) = 0
12.         _Smoothness ("Smoothness", Range(0, 1)) = 0.1
13.  
14.         [NoScaleOffset] _ParallaxMap ("Parallax", 2D) = "black" {}
15.         _ParallaxStrength ("Parallax Strength", Range(0, 0.1)) = 0
16.  
17.         [NoScaleOffset] _OcclusionMap ("Occlusion", 2D) = "white" {}
18.         _OcclusionStrength ("Occlusion Strength", Range(0, 1)) = 1
19.  
20.         [NoScaleOffset] _EmissionMap ("Emission", 2D) = "black" {}
21.         _Emission ("Emission", Color) = (0, 0, 0)
22.  
23.         [NoScaleOffset] _DetailMask ("Detail Mask", 2D) = "white" {}
24.         _DetailTex ("Detail Albedo", 2D) = "gray" {}
25.         [NoScaleOffset] _DetailNormalMap ("Detail Normals", 2D) = "bump" {}
26.         _DetailBumpScale ("Detail Bump Scale", Float) = 1
27.  
28.         _Cutoff ("Alpha Cutoff", Range(0, 1)) = 0.5
29.  
30.         [HideInInspector] _SrcBlend ("_SrcBlend", Float) = 1
31.         [HideInInspector] _DstBlend ("_DstBlend", Float) = 0
32.         [HideInInspector] _ZWrite ("_ZWrite", Float) = 1
33.     }
34.  
35.     CGINCLUDE
36.  
37.     #define BINORMAL_PER_FRAGMENT
38.     #define FOG_DISTANCE
39.  
40.     #define PARALLAX_BIAS 0
41. //    #define PARALLAX_OFFSET_LIMITING
42.     #define PARALLAX_RAYMARCHING_STEPS 10
43.     #define PARALLAX_RAYMARCHING_INTERPOLATE
44. //    #define PARALLAX_RAYMARCHING_SEARCH_STEPS 3
45.     #define PARALLAX_FUNCTION ParallaxRaymarching
46.     #define PARALLAX_SUPPORT_SCALED_DYNAMIC_BATCHING
47.  
48.     ENDCG
49.  
50.     SubShader {
51.  
52.         Pass {
53.             Tags {
54.                 "LightMode" = "ForwardBase"
55.             }
56.             Blend [_SrcBlend] [_DstBlend]
57.             ZWrite [_ZWrite]
58.  
59.             CGPROGRAM
60.  
61.  
62.             #pragma target 3.0
63.  
64.             #pragma shader_feature _ _RENDERING_CUTOUT _RENDERING_FADE _RENDERING_TRANSPARENT
65.             #pragma shader_feature _METALLIC_MAP
66.             #pragma shader_feature _ _SMOOTHNESS_ALBEDO _SMOOTHNESS_METALLIC
67.             #pragma shader_feature _NORMAL_MAP
68.             #pragma shader_feature _PARALLAX_MAP
69.             #pragma shader_feature _OCCLUSION_MAP
70.             #pragma shader_feature _EMISSION_MAP
71.             #pragma shader_feature _DETAIL_MASK
72.             #pragma shader_feature _DETAIL_ALBEDO_MAP
73.             #pragma shader_feature _DETAIL_NORMAL_MAP
74.  
75.             #pragma multi_compile _ LOD_FADE_CROSSFADE
76.  
77.             #pragma multi_compile_fwdbase
78.             #pragma multi_compile_fog
79.             #pragma multi_compile_instancing
80.             #pragma instancing_options lodfade force_same_maxcount_for_gl
81.  
82.             #pragma vertex MyVertexProgram
83.             #pragma fragment MyFragmentProgram
84.  
85.             #define FORWARD_BASE_PASS
86.  
87.             #pragma target 4.0
88.             #pragma vertex MyVertexProgram
89.             #pragma fragment MyFragmentProgram
90.             #pragma geometry MyGeometryProgram
91.  
92.             #include "MyFlatWireframe.cginc"
93.  
94.             ENDCG
95.         }
96.  
97.         Pass {
98.             Tags {
99.                 "LightMode" = "ForwardAdd"
100.             }
101.  
102.             Blend [_SrcBlend] One
103.             ZWrite Off
104.  
105.             CGPROGRAM
106.  
107.             #pragma target 3.0
108.  
109.             #pragma shader_feature _ _RENDERING_CUTOUT _RENDERING_FADE _RENDERING_TRANSPARENT
110.             #pragma shader_feature _METALLIC_MAP
111.             #pragma shader_feature _ _SMOOTHNESS_ALBEDO _SMOOTHNESS_METALLIC
112.             #pragma shader_feature _NORMAL_MAP
113.             #pragma shader_feature _PARALLAX_MAP
114.             #pragma shader_feature _DETAIL_MASK
115.             #pragma shader_feature _DETAIL_ALBEDO_MAP
116.             #pragma shader_feature _DETAIL_NORMAL_MAP
117.  
118.             #pragma multi_compile _ LOD_FADE_CROSSFADE
119.  
120.             #pragma multi_compile_fwdadd_fullshadows
121.             #pragma multi_compile_fog
122.            
123.             #pragma vertex MyVertexProgram
124.             #pragma fragment MyFragmentProgram
125.  
126.             #pragma target 4.0
127.             #pragma vertex MyVertexProgram
128.             #pragma fragment MyFragmentProgram
129.             #pragma geometry MyGeometryProgram
130.  
131.             #include "MyFlatWireframe.cginc"
132.  
133.             ENDCG
134.         }
135.  
136.         Pass {
137.             Tags {
138.                 "LightMode" = "Deferred"
139.             }
140.  
141.             CGPROGRAM
142.  
143.             #pragma target 3.0
144.             #pragma exclude_renderers nomrt
145.  
146.             #pragma shader_feature _ _RENDERING_CUTOUT
147.             #pragma shader_feature _METALLIC_MAP
148.             #pragma shader_feature _ _SMOOTHNESS_ALBEDO _SMOOTHNESS_METALLIC
149.             #pragma shader_feature _NORMAL_MAP
150.             #pragma shader_feature _PARALLAX_MAP
151.             #pragma shader_feature _OCCLUSION_MAP
152.             #pragma shader_feature _EMISSION_MAP
153.             #pragma shader_feature _DETAIL_MASK
154.             #pragma shader_feature _DETAIL_ALBEDO_MAP
155.             #pragma shader_feature _DETAIL_NORMAL_MAP
156.  
157.             #pragma multi_compile _ LOD_FADE_CROSSFADE
158.  
159.             #pragma multi_compile_prepassfinal
160.             #pragma multi_compile_instancing
161.             #pragma instancing_options lodfade
162.  
163.             #pragma vertex MyVertexProgram
164.             #pragma fragment MyFragmentProgram
165.  
166.             #define DEFERRED_PASS
167.  
168.             #pragma target 4.0
169.             #pragma vertex MyVertexProgram
170.             #pragma fragment MyFragmentProgram
171.             #pragma geometry MyGeometryProgram
172.  
173.             #include "MyFlatWireframe.cginc"
174.  
175.             ENDCG
176.         }
177.  
178.         Pass {
179.             Tags {
180.                 "LightMode" = "ShadowCaster"
181.             }
182.  
183.             CGPROGRAM
184.  
185.             #pragma target 3.0
186.  
187.             #pragma shader_feature _ _RENDERING_CUTOUT _RENDERING_FADE _RENDERING_TRANSPARENT
188.             #pragma shader_feature _SEMITRANSPARENT_SHADOWS
189.             #pragma shader_feature _SMOOTHNESS_ALBEDO
190.  
191.             #pragma multi_compile _ LOD_FADE_CROSSFADE
192.  
193.             #pragma multi_compile_shadowcaster
194.             #pragma multi_compile_instancing
195.             #pragma instancing_options lodfade force_same_maxcount_for_gl
196.  
197.             #pragma vertex MyShadowVertexProgram
198.             #pragma fragment MyShadowFragmentProgram
199.  
200.             #include "My Shadows.cginc"
201.  
202.             ENDCG
203.         }
204.  
205.         Pass {
206.             Tags {
207.                 "LightMode" = "Meta"
208.             }
209.  
210.             Cull Off
211.  
212.             CGPROGRAM
213.  
214.             #pragma vertex MyLightmappingVertexProgram
215.             #pragma fragment MyLightmappingFragmentProgram
216.  
217.             #pragma shader_feature _METALLIC_MAP
218.             #pragma shader_feature _ _SMOOTHNESS_ALBEDO _SMOOTHNESS_METALLIC
219.             #pragma shader_feature _EMISSION_MAP
220.             #pragma shader_feature _DETAIL_MASK
221.             #pragma shader_feature _DETAIL_ALBEDO_MAP
222.  
223.             #include "My Lightmapping.cginc"
224.  
225.             ENDCG
226.         }
227.     }
228.  
229.     CustomEditor "MyLightingShaderGUI"
230. }

Thanks in advance!