Hex #555713 or rgb(85,87,19) in RGB space is the tint of yellow. It has hue angle of 61.76 degrees, value = 34 and saturation = 78. #555713 can be obtained by mixing 3 colors: 3 drops of yellow, 1 drop of blue, 5 drops of black.
Nearest safe hex - #666600. Below you can see the block with #555713 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555713 to the mixer and play with it.