Hex #664e11 or rgb(102,78,17) in RGB space is the tint of khaki. It has hue angle of 43.06 degrees, value = 40 and saturation = 83. #664e11 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of red, 1 drop of blue, 5 drops of black.
Nearest safe hex - #666600. Below you can see the block with #664e11 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664e11 to the mixer and play with it.