Hex #808d00 or rgb(128,141,0) in RGB space is the tint of yellow. It has hue angle of 65.53 degrees, value = 55 and saturation = 100. #808d00 can be obtained by mixing 3 colors: 4 drops of yellow, 1 drop of green, 3 drops of black.
Nearest safe hex - #999900. Below you can see the block with #808d00 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #808d00 to the mixer and play with it.