Hex #557356 or rgb(85,115,86) in RGB space is the tint of green. It has hue angle of 122.00 degrees, value = 45 and saturation = 26. #557356 can be obtained by mixing 3 colors: 2 drops of yellow, 3 drops of blue, 1 drop of black.
Nearest safe hex - #666666. Below you can see the block with #557356 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557356 to the mixer and play with it.