clifdene,
You are quite correct!... that is what the entry looks like in the registry, but you only need to change the hexadecimal number.
If you make the change in the registry itself....
Change only the six digit number after the ff, to the hexadecimal number for the colour you want. DO NOT CHANGE ANYTHING ELSE. (And don't forget the ff)
And if you use or change the script, it MUST be in the style shown in that script, ie... "BackgroundTopColor"=dword:ff000040
For the record... here's -
Jim's registry hack!