Hex #66183c or rgb(102,24,60) in RGB space is the tint of scarlet. It has hue angle of 332.31 degrees, value = 40 and saturation = 76. #66183c can be obtained by mixing 4 colors: 2 drops of red, 2 drops of magenta, 1 drop of cyan, 5 drops of black.
Nearest safe hex - #660033. Below you can see the block with #66183c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66183c to the mixer and play with it.