Hex #6d0000 or rgb(109,0,0) in RGB space is the tint of red. It has hue angle of 0.00 degrees, value = 43 and saturation = 100. #6d0000 can be obtained by mixing 2 colors: 3 drops of red, 4 drops of black.
Nearest safe hex - #660000. Below you can see the block with #6d0000 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #6d0000 to the mixer and play with it.