Hex #664844 or rgb(102,72,68) in RGB space is the tint of red. It has hue angle of 7.06 degrees, value = 40 and saturation = 33. #664844 can be obtained by mixing 3 colors: 2 drops of magenta, 2 drops of green, 1 drop of black.
Nearest safe hex - #663333. Below you can see the block with #664844 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664844 to the mixer and play with it.