Dashes not matching carpet or even seats is typical in 61 to 64 Chevy's.
Factory dashes were painted with flat paint (not gloss) and every original car I have seen the dash did not match
the carpet. Dashes also did not necessarily match the seat color. My blue and red dashes in my cars are darker than the carpet and seats.
Padded dashes did not match the factory dash paint in factory original cars
Paul