Hex #553739 or rgb(85,55,57) in RGB space is the tint of red. It has hue angle of 356.00 degrees, value = 33 and saturation = 35. #553739 can be obtained by mixing 4 colors: 2 drops of red, 1 drop of cyan, 1 drop of white, 5 drops of black.
Nearest safe hex - #663333. Below you can see the block with #553739 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #553739 to the mixer and play with it.