Color float rgb values cannot be converted correctly to int, and hex.

So... I'm Trying to convert some colors in Hex code to read a bitmap and transform it in a matrix that i use to generate boards.

I Tried to use TryParseHtmlString (https://docs.unity3d.com/ScriptReference/ColorUtility.TryParseHtmlString.html) but it returns the wrong HexCode(I was comparing to the colors i used in photoshop to create the bitmap).

Than i tried to make what is showed in this video(https://www.youtube.com/watch?v=CMGn2giYLc8), and didn't work too.

So i tried to create my own float to hex converter, but, i perceived that the problem is when i try to convert the float number that unity gives me from varColor.r into a int. For example, when i try to convert it in a int this thing fucks me up, because he rounds the number to the wrong side some times (in photoshop is rgb(64, 0, 0) and unity returns me rgb(65,0,0). Than my converter is useless. Because i can't have the exact color that i create in photoshop from the code.

My question is. There is any ways to get the EXACT rgb color in integers? Because if haven't i will recode all this part of colors and rethink how to organize and recognize this color infos.

Here is my code:

 public static string GetHexCode(Color color)
 {
     var redHex = GetHexPerColor(Mathf.RoundToInt(color.r * 255));
     var greenHex = GetHexPerColor(Mathf.RoundToInt(color.g * 255));
     var blueHex = GetHexPerColor(Mathf.RoundToInt(color.b * 255));
     var result = redHex + greenHex + blueHex;
     return result;
 }

 private static string GetHexPerColor(int amount)
 {
     var firstDefiner = Mathf.RoundToInt(amount / 16f);
     var secondDefiner = amount % 16f;
     secondDefiner /= 0.0625f;
     var result = "";

     switch (firstDefiner)
     {
         case 0:
             result += 0;
             break;
         case 1:
             result += 1;
             break;
         case 2:
             result += 2;
             break;
         case 3:
             result += 3;
             break;
         case 4:
             result += 4;
             break;
         case 5:
             result += 5;
             break;
         case 6:
             result += 6;
             break;
         case 7:
             result += 7;
             break;
         case 8:
             result += 8;
             break;
         case 9:
             result += 9;
             break;
         case 10:
             result += 'A';
             break;
         case 11:
             result += 'B';
             break;
         case 12:
             result += 'C';
             break;
         case 13:
             result += 'D';
             break;
         case 14:
             result += 'E';
             break;
         case 15:
             result += 'F';
             break;
         default:
             Debug.Log("Invalid Value");
             break;
     }
     
     switch (secondDefiner)
     {
         case 0:
             result += 0;
             break;
         case 1:
             result += 1;
             break;
         case 2:
             result += 2;
             break;
         case 3:
             result += 3;
             break;
         case 4:
             result += 4;
             break;
         case 5:
             result += 5;
             break;
         case 6:
             result += 6;
             break;
         case 7:
             result += 7;
             break;
         case 8:
             result += 8;
             break;
         case 9:
             result += 9;
             break;
         case 10:
             result += 'A';
             break;
         case 11:
             result += 'B';
             break;
         case 12:
             result += 'C';
             break;
         case 13:
             result += 'D';
             break;
         case 14:
             result += 'E';
             break;
         case 15:
             result += 'F';
             break;
         default:
             Debug.Log("Invalid Value");
             break;
     }

     return result;
 }

When it converts correctly from varColor.r, g or b this work perfectly, but depending on color it doesn't work. Some one can save me please? Even with a solution to create the BitMaps in float values from 0 to 1, than i can convert correctly. I don't know.