Hex #661f2b or rgb(102,31,43) in RGB space is the tint of scarlet red. It has hue angle of 349.86 degrees, value = 40 and saturation = 70. #661f2b can be obtained by mixing 4 colors: 4 drops of red, 1 drop of blue, 1 drop of cyan, 4 drops of black.
Nearest safe hex - #663333. Below you can see the block with #661f2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #661f2b to the mixer and play with it.