Hex #40af4b or rgb(64,175,75) in RGB space is the tint of green. It has hue angle of 125.95 degrees, value = 69 and saturation = 63. #40af4b can be obtained by mixing 4 colors: 2 drops of yellow, 2 drops of blue, 1 drop of cyan, 3 drops of green.
Nearest safe hex - #339933. Below you can see the block with #40af4b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40af4b to the mixer and play with it.