Hex #557d17 or rgb(85,125,23) in RGB space is the tint of olive. It has hue angle of 83.53 degrees, value = 49 and saturation = 82. #557d17 can be obtained by mixing 4 colors: 5 drops of yellow, 2 drops of blue, 3 drops of green, 5 drops of black.
Nearest safe hex - #666600. Below you can see the block with #557d17 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557d17 to the mixer and play with it.