The truth!?

illumination

I took those images at different times, and making use of the direct sunlight as my only light source.  Look at how the color changed from time to time. The color of the wall for example. Ignoring the tint, tone and shade…what is the true color (the hue) of it? What is the truth?

In my opinion now…only if I make assumption and only if the person that i talk to agreed that we look at it at the same time (and date-because tomorrow, there is possibility that the sun will illumine the surface with different color, depends on the weather and the atmosphere and something else that affects the color of the sunlight) then only we both can name a color for the wall’s.