Question: What is the color yellow often associated with in relation to the painting "The Night Watch?"
About the article "The Night Watch", section "Key elements".

Candidate passages:
Yellow is the color most associated with optimism and pleasure; it is a color designed to attract attention, and for amusement.
Yellow dresses in fashion are rare, but always associated with gaiety and celebration. 
Brown is the color of dark wood or rich soil.
It is a composite color made by combining red, black and yellow.
The color is seen widely in nature, in wood, soil, and human hair color, eye color and skin pigmentation.
Culturally, it is most often associated with plainness, humility, the rustic, and poverty. 
Team KIII is associated with the color yellow. 
The painting is renowned for three characteristics: its colossal size (), the effective use of light and shadow (chiaroscuro), and the perception of motion in what would have traditionally been a static military portrait.
The painting was completed in 1642, at the peak of the Dutch Golden Age.
It depicts the eponymous company moving out, led by Captain Frans Banning Cocq (dressed in black, with a red sash) and his lieutenant, Willem van Ruytenburch (dressed in yellow, with a white sash).
With effective use of sunlight and shade, Rembrandt leads the eye to the three most important characters among the crowd, the two gentlemen in the centre (from whom the painting gets its original title), and the small girl in the centre left background.
Behind them, the company's colours are carried by the ensign, Jan Visscher Cornelissen.
Rembrandt has displayed the traditional emblem of the Arquebusiers in the painting in a natural way: the girl in yellow dress in the background is carrying the main symbols.
She is a kind-of mascot herself: the claws of a dead chicken on her belt represent the "clauweniers" (arquebusiers); the pistol behind the chicken stands for 'clover'; and, she is holding the militia's goblet.
The man in front of her is wearing a helmet with an oak leaf, a traditional motif of the Arquebusiers.
The dead chicken is also meant to represent a defeated adversary.
The colour yellow is often associated with victory.
Another interpretation proposes that Rembrandt designed this painting with several layers of meaning, as was common among the most talented artists.
Thus, the" Night Watch" is symmetrically divided, firstly to illustrate the union between the Dutch Protestants and the Dutch Catholics, and secondly to evoke the war effort against the Spaniards.
For instance, accordingly to Rembrandt's multilayered design, the taller Captain (in black) symbolizes the Dutch Protestant leadership, loyally supported by the Dutch Catholics (represented by the shorter Lieutenant, in yellow).
Moreover, all characters of this painting were conceived to present double readings.
  Because of their status as the color of Roman emperors, and as colors worn by monarchs and princes, the colors violet and purple are often associated with luxury.
Certain luxury goods, such as watches and jewelry, are often placed in boxes lined with violet velvet, since violet is the complementary color of yellow, and shows gold to best advantage.
Chocolates are often wrapped in purple.