Hex #556300 or rgb(85,99,0) in RGB space is the tint of lime. It has hue angle of 68.48 degrees, value = 39 and saturation = 100. #556300 can be obtained by mixing 3 colors: 3 drops of yellow, 1 drop of green, 5 drops of black.
Nearest safe hex - #666600. Below you can see the block with #556300 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #556300 to the mixer and play with it.