Converting System.Drawing.Color to hex

One quick code note to make during building my Azure Cognitive Services demo application. I needed a way how to convert colors of System.Drawing to hex strings that I can use in views. Here is my simple and elegant solution.

To convert Color to hexadecimal string we can use ColorTranslator class from System.Drawing namespace. As I don’t want views to have direct dependencies to System.Drawing classes I wrap ColorTranslator to HtmlHelper extension method.

public static class HtmlExtensions
{
    public static string ColorToHex(this HtmlHelper helper, Color color)
    {
        return ColorTranslator.ToHtml(Color.FromArgb(color.ToArgb()));
    }
}

I convert color to ARGB first as otherwise ColorTranslator returns me the CSS name of color. Converting to ARGB ensures that return value is always the hex string – even for colors with known names.

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Gunnar Peipman

Gunnar Peipman is ASP.NET, Azure and SharePoint fan, Estonian Microsoft user group leader, blogger, conference speaker, teacher, and tech maniac. Since 2008 he is Microsoft MVP specialized on ASP.NET.

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