Western/American Symbolism of Colors

• Blue - Calming, also patriotic in the US.  Depending on the shade may be a stronger or cooler color. Traditional color for boys. Symbolic of the sky.
  
• Brown - Symbolic of harmony.
  
• Gray - Neutral color.
  
• Green - Symbol of growth and life!  Recently has become the Environmental color.  Also signifies harmony.
  
• Gold - Kingly color
  
• Purple - traditional color of royalty and spirituality. Purple dye used to be extremely expensive and was reserved for royalty
• Red - Strong color showing strength. Patriotic in the US.
  
• Pink - Traditional color of girls. Softer than Red, as well as it's sweet side.  Large amounts of Pink can cause a person to become weak.  Pink is seen as a feminine, delicate color. Pink symbolizes romantic love, where Red is a stronger, passionate love.
• Silver - Symbolic of purity.
  
• Yellow - Cheerful color symbolizing sunshine and divinity.
  
• White - In American culture mean purity.  When combined with Red and Blue patriotic.
  

Symbolic Colors

• Patriotic Colors - Patriotic colors from the American Flag.
• Earth Colors - Brown, Green, Yellow, and Orange.
• Mourning - Black.
  

Seasonal Colors

Holiday Colors:

• Valentines Day - Red
• Christmas - Green and Red (burgundy).
  
• Easter - Pastels are traditional Color used for Easter Dresses. Pastels are pale colors.  Purple, Green, Yellow, and other pastel colors.
  
• Halloween - Orange and Black
• St. Patrick's Day - Green for the luck of the Irish.
• July 4th - Independence Day in the US - Red, White, and Blue.
  

References:

• Psychological impact of color (great site).
• About.com on Color Symbolism
  
• Feng Shui Color Guide
• Perception of Colors in Print
• Colors in Christianity