Hex #808a00 or rgb(128,138,0) in RGB space is the tint of yellow. It has hue angle of 64.35 degrees, value = 54 and saturation = 100. #808a00 can be obtained by mixing 3 colors: 2 drops of yellow, 3 drops of red, 5 drops of green.
Nearest safe hex - #999900. Below you can see the block with #808a00 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #808a00 to the mixer and play with it.