Tell your monkey brain to not notice apple, but instead ask:
(1) Where is the light source and what is it doing to the
color?
(2) Where are the form shadows and the cast shadows?
(3) In what direction are the angles tilting on the outside edges?
(4) What hues do I see
where the light rays are hitting strongest?
(5) What hues do I see in the form shadow?
(6) What values are those hues?
(7) How saturated are those
hues?
I could continue with many more questions about why we see this apple the way we do.