And to be fair, in context it's not unreasonable to read "invented colors" as "they came up with a novel application for specific colors". Or more simply, they "invented a user for these colors".
While colors are not "invented", there use and application is material/situationally dependent. Vantablack is absolutely an invented "color" since it's use requires both the color and material application. Disney's painting of these buildings with a specific color, finish, and properties is not much different.
Hmmm. I thought "color" is the mix of the frequencies of the light being reflected and/or emitted. I wouldn't call other things that affect the appearance "color" at all.
For instance, you can have a flat blue and a glossy blue that are the exact same color.
While I think you're technically correct, my practical opinion is the two are essentially inseparable. Physical properties greatly affect how a color is perceived.
While colors are not "invented", there use and application is material/situationally dependent. Vantablack is absolutely an invented "color" since it's use requires both the color and material application. Disney's painting of these buildings with a specific color, finish, and properties is not much different.