Hex #553c1d or rgb(85,60,29) in RGB space is the tint of orange. It has hue angle of 33.21 degrees, value = 33 and saturation = 66. #553c1d can be obtained by mixing 4 colors: 1 drop of red, 1 drop of magenta, 2 drops of green, 2 drops of black.
Nearest safe hex - #663333. Below you can see the block with #553c1d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #553c1d to the mixer and play with it.