Hex #551c4c or rgb(85,28,76) in RGB space is the tint of crimson. It has hue angle of 309.47 degrees, value = 33 and saturation = 67. #551c4c can be obtained by mixing 4 colors: 3 drops of magenta, 1 drop of blue, 1 drop of green, 4 drops of black.
Nearest safe hex - #663333. Below you can see the block with #551c4c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #551c4c to the mixer and play with it.