Hex #551a42 or rgb(85,26,66) in RGB space is the tint of crimson. It has hue angle of 319.32 degrees, value = 33 and saturation = 69. #551a42 can be obtained by mixing 4 colors: 1 drop of red, 2 drops of magenta, 1 drop of cyan, 5 drops of black.
Nearest safe hex - #663333. Below you can see the block with #551a42 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #551a42 to the mixer and play with it.