Hex #665b44 or rgb(102,91,68) in RGB space is the tint of khaki. It has hue angle of 40.59 degrees, value = 40 and saturation = 33. #665b44 can be obtained by mixing 3 colors: 4 drops of magenta, 5 drops of green, 1 drop of black.
Nearest safe hex - #666633. Below you can see the block with #665b44 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #665b44 to the mixer and play with it.