Hex #558122 or rgb(85,129,34) in RGB space is the tint of olive. It has hue angle of 87.79 degrees, value = 51 and saturation = 74. #558122 can be obtained by mixing 4 colors: 5 drops of yellow, 3 drops of blue, 3 drops of green, 4 drops of black.
Nearest safe hex - #669933. Below you can see the block with #558122 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558122 to the mixer and play with it.