Hex #6a391d or rgb(106,57,29) in RGB space is the tint of orange red. It has hue angle of 21.82 degrees, value = 42 and saturation = 73. #6a391d can be obtained by mixing 4 colors: 5 drops of red, 2 drops of blue, 3 drops of green, 2 drops of black.
Nearest safe hex - #663333. Below you can see the block with #6a391d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #6a391d to the mixer and play with it.