Hex #664e22 or rgb(102,78,34) in RGB space is the tint of khaki. It has hue angle of 38.82 degrees, value = 40 and saturation = 67. #664e22 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of magenta, 1 drop of blue, 5 drops of black.
Nearest safe hex - #666633. Below you can see the block with #664e22 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664e22 to the mixer and play with it.