I don't mind the colorizations, but to give you some additional ammo for your argument, check out the TV show "The Munsters" and "The Addams Family". If you're not familiar, they're supposed to live in creepy dark houses, and in black and white, the houses do indeed look dark and creepy.

But in reality, those sets were bright pastels. Actual dark walls and floors didn't show up well on film. Which makes me wonder how right we are with some of our other colorizations.

You can google [what did the munsters set actually look like] to get some great examples.