Each colour and shadow/light creates depthsh
Height ,width,(frame)
personally projecting your own reality into the scene.
No two people see a picture from the same point of view, even when measured ,fractional differences come into being,no two natural things are the  same,when magnified to the finest detail.And  two of the same scenes placed next to each other can only be that way ,else one would be obscured , only appear different from their unusual point of view.
The smallest opposing colour tends to the fore-ground wether the opposites be black or white, yellow or red,or any other polarising colour.The larger colour to the background
.ie; night and day ..Dusk being the combination of the two light elements making a bland outlandish or dawn like eeriness .