Hex #555339 or rgb(85,83,57) in RGB space is the tint of yellow. It has hue angle of 55.71 degrees, value = 33 and saturation = 33. #555339 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of red, 4 drops of blue, 4 drops of black.
Nearest safe hex - #666633. Below you can see the block with #555339 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555339 to the mixer and play with it.