0_Apprentice
I love green, its my favourite colur
1_Wizard
It is a nice color indeed, many rock formations have green in it, the most notable being the emerald.  
0_Apprentice
Is it a primary colour?
1_Wizard
Not, in the subtractive color system. But in the RGB system used for television it is used. 
0_Apprentice
IIs green the most used colour in the world?