green function
| Input type | Output type | 
| color | float | 
The green function extracts the green component of a color and returns it. Colors contain four components: red, green, blue, and alpha. To construct a color from the individual components, use the rgb or rgba functions.
Examples:
green(rgb(1, 0.2, 0)) ; 0.2 green(rgb(0.5, 1, 0.3)) ; 1.0 green(hsl(2, 1, 0.5)) ; 1.0
See Also
 red function
 blue function
 hue function
 alpha function
 Writing direct coloring algorithms