Hex #403b20 or rgb(64,59,32) in RGB space is the tint of khaki. It has hue angle of 50.63 degrees, value = 25 and saturation = 50. #403b20 can be obtained by mixing 4 colors: 4 drops of red, 3 drops of blue, 4 drops of green, 5 drops of black.
Nearest safe hex - #333333. Below you can see the block with #403b20 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #403b20 to the mixer and play with it.