Hex #554d2b or rgb(85,77,43) in RGB space is the tint of khaki. It has hue angle of 48.57 degrees, value = 33 and saturation = 49. #554d2b can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of red, 3 drops of blue, 5 drops of black.
Nearest safe hex - #666633. Below you can see the block with #554d2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #554d2b to the mixer and play with it.