If you hadn't noticed, we get asked about these blonde colors A LOT. Almost every color question we receive at CysterWigs.com is about reds or blondes. (The reason: these colors are rare in nature and difficult to duplicate in a salon or in a wig.)
In this case, the closest Henry Margu color to Jon Renau's popular 12FS8 is 26GR, though the two are NOT an exact match.
26GR is a gold blonde with lighter blonde highlights, and a medium brown gradient root.