Hex #403720 or rgb(64,55,32) in RGB space is the tint of khaki. It has hue angle of 43.13 degrees, value = 25 and saturation = 50. #403720 can be obtained by mixing 4 colors: 1 drop of red, 1 drop of green, 1 drop of white, 5 drops of black.
Nearest safe hex - #333333. Below you can see the block with #403720 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #403720 to the mixer and play with it.