Green is the colour of nature. It symbolizes growth, harmony, freshness, and fertility. Green has strong emotional correspondence with safety. Dark green is also commonly associated with money.
Green has great healing power. It is the most restful colour for the human eye; it can improve vision. Green suggests stability and endurance. In heraldry, green indicates growth and hope. Green, as opposed to red, means safety; it is the colour of free passage in road traffic.
Use green to indicate safety when advertising drugs and medical products. Green is directly related to nature, so you can use it to promote ‘green’ products. Dull, darker green is commonly associated with money, the financial world, banking, and Wall Street.
Source: Color Wheel Pro