Hex #66422e or rgb(102,66,46) in RGB space is the tint of orange red. It has hue angle of 21.43 degrees, value = 40 and saturation = 55. #66422e can be obtained by mixing 4 colors: 3 drops of yellow, 3 drops of red, 4 drops of blue, 5 drops of black.
Nearest safe hex - #663333. Below you can see the block with #66422e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66422e to the mixer and play with it.