Hex #554f2f or rgb(85,79,47) in RGB space is the tint of khaki. It has hue angle of 50.53 degrees, value = 33 and saturation = 45. #554f2f can be obtained by mixing 4 colors: 2 drops of yellow, 1 drop of magenta, 1 drop of cyan, 5 drops of black.
Nearest safe hex - #666633. Below you can see the block with #554f2f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #554f2f to the mixer and play with it.