Hex #408c4b or rgb(64,140,75) in RGB space is the tint of bluish green. It has hue angle of 128.68 degrees, value = 55 and saturation = 54. #408c4b can be obtained by mixing 4 colors: 1 drop of red, 2 drops of blue, 4 drops of green, 1 drop of white.
Nearest safe hex - #339933. Below you can see the block with #408c4b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #408c4b to the mixer and play with it.