Hex #551a1c or rgb(85,26,28) in RGB space is the tint of red. It has hue angle of 357.97 degrees, value = 33 and saturation = 69. #551a1c can be obtained by mixing 3 colors: 3 drops of red, 1 drop of cyan, 5 drops of black.
Nearest safe hex - #663333. Below you can see the block with #551a1c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #551a1c to the mixer and play with it.