Hex #558d15 or rgb(85,141,21) in RGB space is the tint of olive. It has hue angle of 88.00 degrees, value = 55 and saturation = 85. #558d15 can be obtained by mixing 4 colors: 3 drops of yellow, 4 drops of green, 1 drop of white, 4 drops of black.
Nearest safe hex - #669900. Below you can see the block with #558d15 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558d15 to the mixer and play with it.