Depending on the year, she could have been BS381C 697 Light Admiralty Grey. The RN used that up to 1968. A very blue grey which looks different in various lights. These two Tribals have the same paint but look a different colour.
Italian ships use RAL colours Weatherwork 7001, deck 7031 & flight deck 7016.
My Brandenburg 1/96 scale used a rattle can (duplicolor) auto paint. I use a little darker shade the USN. HMS ships are definitely Gull Grey. Italian ships look like standard haze grey (visited the Alpino in Baltimore).
Are you sure? They were 2 tone sometime in the 1980s but don't look it now to me.