Hex #554c39 or rgb(85,76,57) in RGB space is the tint of khaki. It has hue angle of 40.71 degrees, value = 33 and saturation = 33. #554c39 can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of red, 3 drops of blue, 3 drops of black.
Nearest safe hex - #663333. Below you can see the block with #554c39 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #554c39 to the mixer and play with it.