Luckily there are community passion-projects like the Silverscreen Edition and 4K77 and so on.

Oh. I didn’t know this was a thing. In my mother tongue (German) it is like a normal expression.

My quick guess is that it is so dim, that our eyes are seeing it mostly with the rods (instead of the cones), which only see black and white. „In the night all cats are gray“

In the contrary you could argue, that humanizing them makes it easier to emotionally connect for humans. If that was the intention of the statue it works better that way. But I agree: if the statue would purely be for honoring the mice, it would be more appropriate to look like a real mouse.