This function returns the amount of green used to make the given colour, with the value being between 0 and 255, where 0 is no green and 255 is all green. The following image illustrates this:
|col||The colour to check|
g_comp = colour_get_green(c_teal);
The above code will get the green component of the colour constant "c_teal" and store the value in the variable "g_comp".