Hex #806400 or rgb(128,100,0) in RGB space is the tint of khaki. It has hue angle of 46.88 degrees, value = 50 and saturation = 100. #806400 can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of red, 2 drops of green, 1 drop of black.
Nearest safe hex - #996600. Below you can see the block with #806400 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #806400 to the mixer and play with it.