Hex #55684e or rgb(85,104,78) in RGB space is the tint of grass green. It has hue angle of 103.85 degrees, value = 41 and saturation = 25. #55684e can be obtained by mixing 4 colors: 3 drops of yellow, 4 drops of blue, 1 drop of white, 4 drops of black.
Nearest safe hex - #666666. Below you can see the block with #55684e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55684e to the mixer and play with it.