Hex #558d1c or rgb(85,141,28) in RGB space is the tint of olive. It has hue angle of 89.73 degrees, value = 55 and saturation = 80. #558d1c can be obtained by mixing 4 colors: 2 drops of yellow, 3 drops of green, 1 drop of white, 3 drops of black.
Nearest safe hex - #669933. Below you can see the block with #558d1c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558d1c to the mixer and play with it.