Hex #665b22 or rgb(102,91,34) in RGB space is the tint of khaki. It has hue angle of 50.29 degrees, value = 40 and saturation = 67. #665b22 can be obtained by mixing 4 colors: 2 drops of red, 2 drops of magenta, 5 drops of green, 1 drop of black.
Nearest safe hex - #666633. Below you can see the block with #665b22 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #665b22 to the mixer and play with it.