Hex #552d2b or rgb(85,45,43) in RGB space is the tint of red. It has hue angle of 2.86 degrees, value = 33 and saturation = 49. #552d2b can be obtained by mixing 4 colors: 1 drop of red, 3 drops of magenta, 3 drops of green, 5 drops of black.
Nearest safe hex - #663333. Below you can see the block with #552d2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #552d2b to the mixer and play with it.