Hex #808800 or rgb(128,136,0) in RGB space is the tint of yellow. It has hue angle of 63.53 degrees, value = 53 and saturation = 100. #808800 can be obtained by mixing 4 colors: 5 drops of yellow, 2 drops of red, 4 drops of green, 3 drops of black.
Nearest safe hex - #999900. Below you can see the block with #808800 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #808800 to the mixer and play with it.