Hex #378d3d or rgb(55,141,61) in RGB space is the tint of green. It has hue angle of 124.19 degrees, value = 55 and saturation = 61. #378d3d can be obtained by mixing 4 colors: 3 drops of yellow, 5 drops of blue, 5 drops of green, 1 drop of black.
Nearest safe hex - #339933. Below you can see the block with #378d3d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #378d3d to the mixer and play with it.