from (http://www.geocities.com/hollywood/theater/9175)
GREEN -
The use of green in this movie is symbolic of the matrix code.
All the scenes inside the matrix (particularly those before Neo is taken out of the pod) were filmed with green tint to them. In fact, in the words of the Wachowski brothers, this use of green tint "...was a whole motif inspired by the phosphorous green of old PCs." Note that many of the objects inside of the matrix are green as well.
In color psychology, green is sometimes associated with sickness, decay, disease, and impending death. ("You're looking a little green, today."😉 Note that green is the color of mold and Mr. Yuk.
The color green is also associated with naivety. Often times people will refer to someone as being "green" when they don't know anything about a topic. All the people inside the matrix don't have a clue that they are really living in a false reality and that they are actually prisoners.
Green stands for jealousy too. (To be "green with envy"; to be "green-eyed."😉
Cypher is envious of Neo's relationship with Trinity and Morpheus.
In Christianity, green is the color of the Trinity. (See my page on "Name and Numbers" for more information on the Christian aspects of this movie.)
BLACK -
Note that most of the characters while in the matrix wear black. The term "black out" refers to to a temporary loss of consciousness or memory. While in the matrix, those plugged in are unconscious or sleeping. After Neo is faced with the knowledge of what the matrix is, he blacks outs.
Black clothing is powerful, intimidating, dramatic, and has a sense of elegance to it. It indicates inner strength, independence, a strong will, and determination.
According to psychologists, an attraction to black may indicate a need for emotional support. (An example often cited is the wearing-all-black phase that many teenagers go through.)
Black is a color of mystery, secrets, and intrique. When we see Trinity for the first time (who is dressed in all black and in a dark room) we we don't know what her intentions are or if she is going to be a villian or a hero in the story.
Black is associated with darkness, death, rememberance, and mourning. In many ways, the freed humans in "The Matrix" are in a state of mourning. They realize what the earth used to be like and they want control of it back.
The color black represents fear, anxiety, and hostility, too. When the freed humans reenter the matrix, they are always in a state of fear and they are anxious about getting back to the real world as soon as possible.
Black is also associated with evil and wickedness.In many cultures, a black cat crossing your path is a sign of bad luck.
Nighttime or darkness is also symbolic of ignorance, a secretive or hidden dimension, the unknown, the power of evil, and stealth (as in "they crept in under the cover of darkness"😉.
Thanx to DEW