If it's the same as the Mk2(a), it's 132 (possibly 132/F) -- Scilla Rosso -- like mine.
Not always. Mine had fallen off! (My sticker, that is....)
However,
RaulCarnahan actually found the colour code for his stamped/pressed into the metal on the underneath of the bonnet, at the back... -- just above the brake fluid container, as I remember....
This is a colour chart for the Mk2(a)... -- but I don't know what changed for the Mk2b, I'm afraid. Hope this helps, though....