returns the green component of the colour (character)
None
| std::green_component_of | the green component of a colour |
| std::red_component_of | the red component of a colour |
| std::blue_component_of | the blue component of a colour |
| std::rgb_character | constructs a colour (character) from its primary colours |
| std::colour_mixture | constructs a colour (character) from a mixture of the specified colours |