Hex #557100 or rgb(85,113,0) in RGB space is the tint of lime. It has hue angle of 74.87 degrees, value = 44 and saturation = 100. #557100 can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of red, 3 drops of green, 3 drops of black.
Nearest safe hex - #666600. Below you can see the block with #557100 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557100 to the mixer and play with it.