Hex #66283c or rgb(102,40,60) in RGB space is the tint of scarlet red. It has hue angle of 340.65 degrees, value = 40 and saturation = 61. #66283c can be obtained by mixing 4 colors: 3 drops of red, 2 drops of blue, 1 drop of white, 4 drops of black.
Nearest safe hex - #663333. Below you can see the block with #66283c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66283c to the mixer and play with it.