Hex #552813 or rgb(85,40,19) in RGB space is the tint of orange red. It has hue angle of 19.09 degrees, value = 33 and saturation = 78. #552813 can be obtained by mixing 4 colors: 2 drops of red, 1 drop of magenta, 2 drops of green, 4 drops of black.
Nearest safe hex - #663300. Below you can see the block with #552813 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #552813 to the mixer and play with it.