Hex #553c39 or rgb(85,60,57) in RGB space is the tint of red. It has hue angle of 6.43 degrees, value = 33 and saturation = 33. #553c39 can be obtained by mixing 3 colors: 1 drop of magenta, 1 drop of green, 1 drop of black.
Nearest safe hex - #663333. Below you can see the block with #553c39 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #553c39 to the mixer and play with it.