Hex #66504d or rgb(102,80,77) in RGB space is the tint of red. It has hue angle of 7.20 degrees, value = 40 and saturation = 25. #66504d can be obtained by mixing 4 colors: 3 drops of magenta, 3 drops of green, 1 drop of white, 3 drops of black.
Nearest safe hex - #666666. Below you can see the block with #66504d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66504d to the mixer and play with it.