Well yeah, that thought is important. While apples do have an objective color in the sense that physics teaches us that electromagnetic radiation with a certain frequency is more or less likely to be absorbed/reflected, we can only perceive a subjective color.
I personally define reality as any measurement that a machine (computer or robot) can take. As such, there is an objective reality. But also, most people mostly act on emotion and not based on real data.
But also, this isn't a meme. It belongs in the philosophy or science memes community.
The face punch method, (not a personal attack just a rather crude if effective philisophical tool) aka if I repeatedly punch you in the face you have a hard time continuing to argue that my fist is not real, or at the very least real enough for practical purposes. Personal involvment makes the situation a lot less abstract.