Thank you so much everyone for the numerous comments and advice that my request has provoked.
Geoff (GG), I had already found your blog on colour (I keep finding extra threads and blogs from your site which make fascinating and, I think, essential reading for restorers). I looked up the two listed codes for Amaranto and they appear to be a grey commonly used by Lambretta, but I will persevere !
Thank you John (Turner) for the Lambda photo, that colour looks so dark compared to the red of my car as purchased. The trouble with photos is that they rarely show the true colour and it is not possible to gauge how far off tone they may be. The (possible) Pozzi car is much darker than that which I was anticipating as a possibility, but certainly looks good and could be a real contender !!
William, with regard to dirty being a lifestyle choice I understand what you are saying, but to me dirt is more of a mandatory extra !!!! It most definitely is not optional !!!!
Thank you again for the help and advice, the decision has yet to be made, so if any other thoughts arise please do share them. I do hear and agree with the comment that whatever colour I choose, it should be one that was originally available, otherwise the field is open.
I have attached a photo of my car, as dragged out of the garage, to indicate the red that I thought may be an option. It would appear that such a light red was not originally available and thus should be excluded.
Andy