Hex #664811 or rgb(102,72,17) in RGB space is the tint of khaki. It has hue angle of 38.82 degrees, value = 40 and saturation = 83. #664811 can be obtained by mixing 4 colors: 3 drops of red, 1 drop of magenta, 4 drops of green, 2 drops of black.
Nearest safe hex - #663300. Below you can see the block with #664811 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664811 to the mixer and play with it.