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The code transforms color codes which are 3 digits like "#000", 8 digits (with opacity) or named colors to a valid 6 digit hex code, using System.Drawing
public static string ToHexadecimalColorCode(string color)
Color baseColor = ColorTranslator.FromHtml(color);
// if its a named color we can use the argb value to transform it to a hex
var argb = baseColor.ToArgb();
return ColorTranslator.ToHtml(Color.FromArgb(argb));
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