Question Surface Shader - Invalid RGB Input

Hello, I created a simple shader, based on Sprites/Diffuse, that replaces Input Color to Ouput Color but it doesn't work well.

I've a single color texture (R=247, G=25, B=255):


Here is my shader:

Code (CSharp):

1. Shader "Custom/Test"
2. {
3.     Properties
4.     {
5.         [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
6.         _InputColor("Input Color", Color) = (1,1,1,1)
7.         _Color ("Tint", Color) = (1,1,1,1)
8.         [MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
9.         [HideInInspector] _RendererColor ("RendererColor", Color) = (1,1,1,1)
10.         [HideInInspector] _Flip ("Flip", Vector) = (1,1,1,1)
11.         [PerRendererData] _AlphaTex ("External Alpha", 2D) = "white" {}
12.         [PerRendererData] _EnableExternalAlpha ("Enable External Alpha", Float) = 0
13.     }
14.  
15.     SubShader
16.     {
17.         Tags
18.         {
19.             "Queue"="Transparent"
20.             "IgnoreProjector"="True"
21.             "RenderType"="Transparent"
22.             "PreviewType"="Plane"
23.             "CanUseSpriteAtlas"="True"
24.         }
25.  
26.         Cull Off
27.         Lighting Off
28.         ZWrite Off
29.         Blend One OneMinusSrcAlpha
30.  
31.         CGPROGRAM
32.         #pragma surface surf Lambert vertex:vert nofog nolightmap nodynlightmap keepalpha noinstancing
33.         #pragma multi_compile_local _ PIXELSNAP_ON
34.         #pragma multi_compile _ ETC1_EXTERNAL_ALPHA
35.         #include "UnitySprites.cginc"
36.  
37.         struct Input
38.         {
39.             float2 uv_MainTex;
40.             fixed4 color;
41.         };
42.  
43.         fixed4 _InputColor;
44.  
45.         void vert (inout appdata_full v, out Input o)
46.         {
47.             v.vertex = UnityFlipSprite(v.vertex, _Flip);
48.  
49.             UNITY_INITIALIZE_OUTPUT(Input, o);
50.             o.color = v.color;
51.         }
52.  
53.         void surf (Input IN, inout SurfaceOutput o)
54.         {
55.             fixed4 mainTextRgba = tex2D(_MainTex, IN.uv_MainTex);
56.  
57.             fixed4 destRgba;
58.             if (all(mainTextRgba == _InputColor))
59.             {
60.                 // Never
61.                 destRgba.r = 1;
62.                 destRgba.g = 0;
63.                 destRgba.b = 0;
64.                 destRgba.a = 1;
65.             }
66.             else if (mainTextRgba.r == 0.9296875298023224 &&
67.                 mainTextRgba.g == 0.00970459030941128817 &&
68.                 mainTextRgba.b == 1)
69.             {
70.                 // Always
71.                 destRgba.r = 0;
72.                 destRgba.g = 1;
73.                 destRgba.b = 0;
74.                 destRgba.a = 1;
75.             }
76.             else
77.             {
78.                 // Never
79.                 destRgba.r = 0;
80.                 destRgba.g = 0;
81.                 destRgba.b = 1;
82.                 destRgba.a = 1;
83.             }
84.  
85.             o.Albedo = destRgba.rgb * destRgba.a;
86.             o.Alpha = destRgba.a;
87.         }
88.         ENDCG
89.     }
90.  
91. Fallback "Transparent/VertexLit"
92. }

I set _inputColor to (R=247, G=25, B=255, A=255). The result should be red with _inputColor set to the texture's color or blue when _inputColor is different but it's always green, I don't know why. Looks like RGB Input is:
R = 0.9296875298023224f ≈ 237
G = 0.00970459030941128817f ≈ 2
B = 1.0f = 255


Any idea why is it happening?
Unity 6000.0.1f1

 

What’s happening is gamma correction.

When you are defining a color in the editor, you’re doing it in sRGB space. If you’re using linear color space for your project, which Unity defaults to, then Unity will convert that sRGB color value to a linear color value.

Any texture and all other color values are also converted to linear color values during rendering when using linear color space.