Hex #557e15 or rgb(85,126,21) in RGB space is the tint of olive. It has hue angle of 83.43 degrees, value = 49 and saturation = 83. #557e15 can be obtained by mixing 4 colors: 3 drops of yellow, 3 drops of green, 1 drop of white, 5 drops of black.
Nearest safe hex - #666600. Below you can see the block with #557e15 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557e15 to the mixer and play with it.