Hex #559b11 or rgb(85,155,17) in RGB space is the tint of olive. It has hue angle of 90.43 degrees, value = 61 and saturation = 89. #559b11 can be obtained by mixing 4 colors: 5 drops of yellow, 1 drop of cyan, 5 drops of green, 4 drops of black.
Nearest safe hex - #669900. Below you can see the block with #559b11 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559b11 to the mixer and play with it.