Hex #664144 or rgb(102,65,68) in RGB space is the tint of red. It has hue angle of 355.14 degrees, value = 40 and saturation = 36. #664144 can be obtained by mixing 3 colors: 2 drops of red, 2 drops of blue, 1 drop of green.
Nearest safe hex - #663333. Below you can see the block with #664144 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664144 to the mixer and play with it.