No color.

[Visual Basic]
Public const xlColorIndexNone As Integer = -2000
[C#]
public const int xlColorIndexNone = -2000;
[C++]
public: const int xlColorIndexNone = -2000;
[JScript]
public const var xlColorIndexNone: int = -2000;

See Also

XlColorIndex Class | NativeExcel Namespace

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