My wife's 335is Coupe is Le Mans Blue, an exclusive color for that model. I don't see that as making it any less exclusive for the E9x M3.
Interlagos Blue was offered both on the Z4 M and the E46 M3.
It's a few years away, but I'm planning on Estoril Blue II for my M4.
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The Coupe: 2016 M4 | Sakhir Orange | Black Full Merino Leather | CF Trim | M-DCT | More | ED 5/13/16
The Sedan: 2018 M3 | San Marino Blue | Black Full Merino Leather | CF Trim | M-DCT | ZCP | ED 7/18/18
The Roadster: 2006 Z4 | Interlagos Blue | Black Extended Nappa Leather | Carbon Leather Trim | Purchased 7/19/12
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