System.Drawing.Color c = System.Drawing.ColorTranslator.FromHtml("#F5F7F8");
String strHtmlColor = System.Drawing.ColorTranslator.ToHtml

thanks for the tip

This piece of code is very good. Thanks it was very helpful.

If you wish to use the above code on the Compact Framework you can using the OpenNETCF.Drawing assembly which has an implementation of the color translator. Thank you for your help.

Aahh, eventually...works like a bomb

In case you wanted to get the Hex value (#FF12200) of a color and not the html name of the color (ie. Color.Black returns "Black"), then you'll need to do the following.

From the AGRB value of the Color
dim s as String = Hex(Color.ToArgb)
'This gives you a string with the hex values of the Alpha, Red, Green, and Blue. You can strip off the first two characters of the string to get just the RGB
s = s.Substring(2)

'Or you can get each of the hex values for the red, green, and blue

s = Hex(Color.R) & Hex(Color.G) & Hex(Color.B)

'And of course, if you need the pound sign, you can add it to the front of the string
s = "#" & s