Hex #8b101f or rgb(139,16,31) in RGB space is the tint of red. It has hue angle of 352.68 degrees, value = 55 and saturation = 88. #8b101f can be obtained by mixing 4 colors: 4 drops of red, 2 drops of magenta, 1 drop of green, 4 drops of black.
Nearest safe hex - #990033. Below you can see the block with #8b101f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #8b101f to the mixer and play with it.