Hex #553539 or rgb(85,53,57) in RGB space is the tint of red. It has hue angle of 352.50 degrees, value = 33 and saturation = 38. #553539 can be obtained by mixing 3 colors: 3 drops of red, 2 drops of cyan, 4 drops of black.
Nearest safe hex - #663333. Below you can see the block with #553539 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #553539 to the mixer and play with it.