WPFのColorDialogのCustomColorsへの変換式
public static int DrawingToInt(System.Drawing.Color color) { return color.B * 256 * 256 + color.G * 256 + color.R; } ...
public static int DrawingToInt(System.Drawing.Color color) { return color.B * 256 * 256 + color.G * 256 + color.R; } ...