Hex #55431c or rgb(85,67,28) in RGB space is the tint of khaki. It has hue angle of 41.05 degrees, value = 33 and saturation = 67. #55431c can be obtained by mixing 4 colors: 3 drops of red, 1 drop of cyan, 2 drops of green, 3 drops of black.
Nearest safe hex - #663333. Below you can see the block with #55431c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55431c to the mixer and play with it.