Hex #8b8800 or rgb(139,136,0) in RGB space is the tint of yellow. It has hue angle of 58.71 degrees, value = 55 and saturation = 100. #8b8800 can be obtained by mixing 4 colors: 4 drops of yellow, 2 drops of red, 3 drops of green, 2 drops of black.
Nearest safe hex - #999900. Below you can see the block with #8b8800 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #8b8800 to the mixer and play with it.