[IMPL] Added RGB to Hex Conversion

UniversalExtensions.cs

@@ -505,6 +505,20 @@ public static class UniversalExtensions
         var min = colors.Min(x => x.Diff);
         return colors.Find(x => x.Diff == min).Value;
     }
+
+
+
+    /// <summary>
+    /// Convert RGB Value to Hex
+    /// </summary>
+    /// <param name="R">Red</param>
+    /// <param name="G">Green</param>
+    /// <param name="B">Blue</param>
+    /// <returns>A string that represents the color in hex (e.g. 255, 0, 0 -> #FF0000)</returns>
+    private static string ToHex(int R, int G, int B)
+    {
+        return "#" + R.ToString("X2") + G.ToString("X2") + B.ToString("X2");
+    }
 }
 
 public static class StringExt