Hello Candy.
There isn`t a straightforward answer here..
Firstly, over the production run. Ford had the brainstorm of changing the shade of silver of the dash panels/stereo.
I have broken a few Pumas over the last year and spotted this while I had these parts on stock from different cars.
Also, none of them are Moondust (of which there are very slightly different shades!)
If you were looking for an exact match, I would either, shop around for replacement panels, taking your panel to match to with you.
Or visit a `proper` autromotive paint supplier. They can make up aerosols to match any example colour . (your bits) similar to what certain D.I.Y. shops offer to do for your living room.
I know of a place on Winwick Road, Warrington.
As for your mental health,
I bet its worse for asking this question..