Even if it was 50 years ahead of time, the plane that smashed into the building had no refractive, ambient, or environmental lighting. It was pure gray.
Check out blender 2.8 eevee environmental light mappings on the internet to see how just about all objects in our natural world have bleed from other light sources. For example, a green circular led on say your computer may slightly alter the area of color on objects in the vicinity.
Even when you look at a window at night, although it is clear you may see the bleed of of other ambient light sources coming from indoor and outdoor. These colors most of the times map in a spherical or skewed fashion.
That plane had no color signatures.