Hex #550839 or rgb(85,8,57) in RGB space is the tint of crimson. It has hue angle of 321.82 degrees, value = 33 and saturation = 91. #550839 can be obtained by mixing 4 colors: 1 drop of red, 2 drops of magenta, 1 drop of blue, 5 drops of black.
Nearest safe hex - #660033. Below you can see the block with #550839 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #550839 to the mixer and play with it.