Hex #378831 or rgb(55,136,49) in RGB space is the tint of green. It has hue angle of 115.86 degrees, value = 53 and saturation = 64. #378831 can be obtained by mixing 4 colors: 3 drops of yellow, 4 drops of blue, 5 drops of green, 2 drops of black.
Nearest safe hex - #339933. Below you can see the block with #378831 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #378831 to the mixer and play with it.