Hex #554f2e or rgb(85,79,46) in RGB space is the tint of khaki. It has hue angle of 50.77 degrees, value = 33 and saturation = 46. #554f2e can be obtained by mixing 4 colors: 5 drops of red, 4 drops of blue, 5 drops of green, 1 drop of black.
Nearest safe hex - #666633. Below you can see the block with #554f2e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #554f2e to the mixer and play with it.