Hex #40aa4b or rgb(64,170,75) in RGB space is the tint of green. It has hue angle of 126.23 degrees, value = 67 and saturation = 62. #40aa4b can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of blue, 4 drops of green, 1 drop of white.
Nearest safe hex - #339933. Below you can see the block with #40aa4b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40aa4b to the mixer and play with it.