Hex #660744 or rgb(102,7,68) in RGB space is the tint of crimson. It has hue angle of 321.47 degrees, value = 40 and saturation = 93. #660744 can be obtained by mixing 4 colors: 1 drop of red, 3 drops of magenta, 1 drop of blue, 5 drops of black.
Nearest safe hex - #660033. Below you can see the block with #660744 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #660744 to the mixer and play with it.