Hex #554d3f or rgb(85,77,63) in RGB space is the tint of khaki. It has hue angle of 38.18 degrees, value = 33 and saturation = 26. #554d3f can be obtained by mixing 4 colors: 4 drops of magenta, 5 drops of green, 1 drop of white, 5 drops of black.
Nearest safe hex - #666633. Below you can see the block with #554d3f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #554d3f to the mixer and play with it.