It wasn't considered silly by John Locke, "Father of Classical Liberalism"
who wrote An Essay Concerning Human Understanding.
And for a more scholarly treatment:
What has classical liberalism got to do with the definition of color and its perception?
I really appreciate that you disagreed with me and didn’t launch into a venomous attack on what a dumb idiot I am. That is the only way a few people on this site can think.