Green is any of a number of similar colors. Green is seen commonly in nature, especially in plants. Many plants are green mainly because of a complex chemical known as chlorophyll which is involved in photosynthesis.
Green light has a wavelength of roughly 520–570 nm and is considered one of the additive primary colors. It is the complement of magenta; more properly the color #FF00FF. People who are red-green color blind can often distinguish between the two colors but confuse them with other colors, for example, bright green with yellow; dark green with brown.
The term "green" does not define an exact color unless it is conjunction with some standard like X11 colors or an absolute color space like sRGB. The two colors shown to the right are wildly different, but each is called "Green" in a widely used color standard.
The color green used in HTML and CSS is actually a dark green (#008000), as seen in the sample to the right: the pure green color is called lime.
There are political parties known as "Green Parties" in over one hundred countries throughout the world (beginning primarily in Europe, though similar parties have taken root around the world). The more generic term "green party" is used for parties that emphasize environmentalism, but it is increasingly out of favour as the Global Greens have succeeded in uniting almost all such parties under a Global Green Charter. In the UK the ecology party became the Green Party.
A "Green Party" (or Faction) also existed in the Byzantine Empire for a while, but of course it had nothing to do with modern Greens. Rather, it developed out of a kind of chariot racing fanclub whose drivers used the color green to distinguish themselves from the opposing "Blue Party".
The flag of Libya is plain green (the traditional color of Islam), the only current national flag of a single color. The flag of Hamas is also green, symbolising their Islamist ideological path.
In North American stock markets, green is used to denote a rise in stock prices. In East Asian stock markets, however, green is used to denote a drop in stock prices.
In stories involving King Arthur and his Knights, the color green signifies mystical or magical properties. An excellent example is in the tale Sir Gawain and the Green Knight. The Green Knight accepted a blow to the neck with an axe - only to have his body pick up his head and ride away. Later, Sir Gawain received a green sash, a gift that protected the wearer from death.
Shades of green | Optical spectrum
Groen (kleur) | أخضر | ܟܣܟܐ | Verd | Zelená | Grøn | Grün | Verde | Verdo | Berde | Vert | Verde | Hijau | Verde | ירוק | Viridis | Gréng | Žalia | Zöld | Зелена боја | Aħdar | Kakariki | Xoxoctic | Vert (Yvelines) | 緑 | Grønn | Grøn | Vèrt | يېشىل رەڭ | Gröön | Barwa zielona | Verde | Verde | Зелёный цвет | Virdi | Green | Zelená | Zelena (barva) | Зелена боја | Héjo | Vihreä | Grön | Xanh lá cây | Yeşil | 綠色