Saying that your car is "white" is a subjective statement based upon how you and most people perceive "color". It could be argued that color doesn't actually exist, and is simply the mechanism by which our minds perceive that an object reflects or doesn't reflect particles corresponding to certain bands of the electromagnetic spectrum. To a being that perceived the electromagnetic spectrum differently, "white" would have no meaning outside of that.And my car is white...it is white this morning when I just woke up ..it was white last night at 7 pm when I havent slept for 30 hours..and so on..and any person who sees clearly and is not color-blind will also recognize it as white..regardless of what their personal values or current feelings are..
Saying that an object is white implies that you accept your perception of color as an exact interpretation of the particles being reflected. You can only validly say that an object appears to be white, not that it is, because that would imply that white existed as an independent entity outside of your perception of it.
The point is, anything that can be perceived by a human mind inherently has a subjective element. "Objective" elements are simply the ones that we all agree upon and perceive the existence of.