Hex #664f50 or rgb(102,79,80) in RGB space is the tint of red. It has hue angle of 357.39 degrees, value = 40 and saturation = 23. #664f50 can be obtained by mixing 4 colors: 3 drops of red, 3 drops of magenta, 4 drops of blue, 5 drops of green.
Nearest safe hex - #666666. Below you can see the block with #664f50 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664f50 to the mixer and play with it.