Hex #665b11 or rgb(102,91,17) in RGB space is the tint of khaki. It has hue angle of 52.24 degrees, value = 40 and saturation = 83. #665b11 can be obtained by mixing 4 colors: 3 drops of red, 1 drop of magenta, 5 drops of green, 1 drop of black.
Nearest safe hex - #666600. Below you can see the block with #665b11 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #665b11 to the mixer and play with it.