Hex #556140 or rgb(85,97,64) in RGB space is the tint of lime. It has hue angle of 81.82 degrees, value = 38 and saturation = 34. #556140 can be obtained by mixing 4 colors: 3 drops of magenta, 5 drops of green, 1 drop of white, 3 drops of black.
Nearest safe hex - #666633. Below you can see the block with #556140 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #556140 to the mixer and play with it.