Hex #55451c or rgb(85,69,28) in RGB space is the tint of khaki. It has hue angle of 43.16 degrees, value = 33 and saturation = 67. #55451c can be obtained by mixing 4 colors: 2 drops of red, 2 drops of green, 1 drop of white, 4 drops of black.
Nearest safe hex - #663333. Below you can see the block with #55451c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55451c to the mixer and play with it.