It definitely does look grey, but I can see a hint of blue in the carpet, the seats, and the panels. He took some photos under the seat which is a mid blue. Also the certificate says blue? Maybe it’s an older restoration? It looks pretty darn original to me. I’m just hoping to find the definitive original “blue” scheme which I’m starting to suspect is very light.
Someone posted a barn find a few threads back blue interior which seems similar in look.