Yes, I agree that projecting "true color" onto the real world is a mistake. I'm not sure those commenters are actually doing that, though. I think your interpretation of the Buzzfeed argument is something like this:

"It's white-and-gold!"

"No, it's blue-and-black! How can you think it's white-and-gold?!"

Whereas my interpretation, I feel, is slightly more charitable:

"I see white-and-gold!"

"No way, I see blue-and-black! Why are you seeing something different from what I'm seeing?"

In other words, I feel that the dicussion isn't quite as full of fallacious reasoning as you seem to be making it out to be (in that it could interpreted in a different way that makes it about something other than the mind projection fallacy). Of course, I could be wrong. What do you think?