Hex #403c2b or rgb(64,60,43) in RGB space is the tint of khaki. It has hue angle of 48.57 degrees, value = 25 and saturation = 33. #403c2b can be obtained by mixing 3 colors: 3 drops of magenta, 4 drops of green, 5 drops of black.
Nearest safe hex - #333333. Below you can see the block with #403c2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #403c2b to the mixer and play with it.