hello !
There are different mecanism. For the lady she gets 2 impressions based on the colors ( main impression : the main color or color familly, such as "shades of green" "cold", and the second impression is a color or color familly which does not share anything with the main impression - so a single red brick among many different shades of green would probably generate : main impression = shades of green, second impression = red)
The guy on the left only reacts to the main impression.
And the art collector to the right mostly reacts to how close you are to the theme, depending on various factors (color proportions, height,...)