Hex #551413 or rgb(85,20,19) in RGB space is the tint of red. It has hue angle of 0.91 degrees, value = 33 and saturation = 78. #551413 can be obtained by mixing 4 colors: 2 drops of red, 1 drop of magenta, 1 drop of green, 5 drops of black.
Nearest safe hex - #660000. Below you can see the block with #551413 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #551413 to the mixer and play with it.