Air Canada's DC-8-40s and the early 54s, had the standard "early" DC-8 interior. That is they were equipped with Palomar seats. These seats has reading lights over-the-shoulder on the seat front, and more lights, f/a call buttons, and oxygen masks on the seat backs.
First class, had blue seats, with grey trim, and orange/blue curtains. Just behind the cockpit was a 5 seat lounge with a stand up bar. Behind that were 2 lavs on one side and galley on the other, then f class seats. Originally 24 seats reduced to 12 by the time the aircraft was retired.
Economy had grey/brown seats with grey/blue curtains.
The wall panels were a dark orange, as were the overhead racks. And remember with the Palomar seats there were no service units in the overhead racks.
The later DC-8-50s and the DC-8-61 and -63s had the second generation DC-8 interiors. And the -61 and -63 interiors were identical.
First class had red seats with gold trim, (as did the lounge/bar), economy had alternating yellow/blue and orange/blue seats. The walls were beige with window shades instead of curtains.
By the late 70s, the -40s and -50s were retired from passenger service. The -63s that remained in passenger service were refitted with 'wide-body' interiors with enclosed overhead racks and movies/music. 2 were in a 10F195Y configuration: F was brown, Y was red/blue, and 6 were in a 226Y used for Rapidair flights. In both of these configurations the forward lounge/bar and 2 lavs were replaced with 1 lav, carry on closets, and the galley was moved forward. The first row of seats therefore was 40" ahead of where it was in the earlier configuration.
Just because I stopped arguing, doesn't mean I think you are right. It just means I gave up!