Different cultures interpret colors in different ways. For instance, in the USA, black is the color of mourning, whereas in China, the color for mourning is white.
I was looking around on color-wheel-pro.com, and while it didn't have the color copper, I picked up Red and Gold (which make up copper, I think):
Red
Love and War: Red is hot. It's a strong color that conjures up a range of seemingly conflicting emotions from passionate love to violence and warfare. Red is Cupid and the Devil.
Nature of Red: A stimulant, red is the hottest of the warm colors. Studies show that red can have a physical effect, increasing the rate of respiration and raising blood pressure. The expression seeing red indicates anger and may stem not only from the stimulus of the color but from the natural flush (redness) of the cheeks, a physical reaction to anger, increased blood pressure, or physical exertion.
Culture of Red: Red is power, hence the red power tie for business people and the red carpet for celebrities and VIPs (very important people).Flashing red lights denote danger or emergency. Stop signs and stop lights are red to get the drivers' attention and alert them to the dangers of the intersection.
In some cultures, red denotes purity, joy, and celebration. Red is the color of happiness and prosperity in China and may be used to attract good luck.
Gold
Riches and Excess: A cousin to yellow (and orange and brown) is gold. While green may be the color of money (U.S. money, that is) gold is the color of riches and extravagance.
Nature of Gold: The color gold shares many of the attributes of yellow. It is a warm color that can be both bright and cheerful as well as somber and traditional.
Culture of Gold: Because gold is a precious metal, the color gold is associated with wealth and prosperity. While all that glitters is not gold the color gold still suggests grandeur, and perhaps on the downside, the excesses of the rich.
Hope it helps!