Hex #556539 or rgb(85,101,57) in RGB space is the tint of lime. It has hue angle of 81.82 degrees, value = 40 and saturation = 44. #556539 can be obtained by mixing 3 colors: 3 drops of magenta, 5 drops of green, 1 drop of black.
Nearest safe hex - #666633. Below you can see the block with #556539 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #556539 to the mixer and play with it.