StringToPastel c#

  public string pastelColorForString (string s) {
      UInt32 hashCode = BitConverter.ToUInt32 (
          new SHA1CryptoServiceProvider ().ComputeHash (
              Encoding.UTF8.GetBytes (s)
          ),0
      );
  
      return "#" +
          ((((hashCode >> 24) & 0xFF)+255)/2).ToString ("X") +
          ((((hashCode >> 16) & 0xFF)+255)/2).ToString ("X") +
          ((((hashCode >> 08) & 0xFF)+255)/2).ToString ("X");
  }