Blue Medio Ferraris.

I've never even heard of it so I'm guessing its a pretty rare color.

 

Here is the code for it........Blue Medio Met. - FER 506/C

 

this is a 328 in Blu Medio

http://www.classicdriver.fr/fr/find/4100_results.asp?lCarID=1694550

 

I wasn't aware of the colour until I saw this thread and I had wondered what the colour of these cars were. Judging by the link from post above, this could be the right colour? I'm not 100% sure as they look a bit green-ish.
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I had to do a double take on your photos - the last one is a Euro 308, with the one preceding it a 328 and they look nearly identical in front.

It's hard to tell with the lighting, but I'd guess the 328 is blu chiaro, which has is brighter than blu medio.