It's too late now, and may not be what you were wanting to do anyway, but FWIW...
Some time ago I found the colour code for the Alumalook paint used in the Boxster S: L4W9 (sometimes just referred to as 4W9?). The pic is of the end of a pencil, painted in L4W9, compared to the factory finished shift knob.
It was surprisingly difficult to find so I thought I'd mention it.