Hex #554c00 or rgb(85,76,0) in RGB space is the tint of yellow. It has hue angle of 53.65 degrees, value = 33 and saturation = 100. #554c00 can be obtained by mixing 4 colors: 1 drop of yellow, 4 drops of red, 5 drops of green, 5 drops of black.
Nearest safe hex - #663300. Below you can see the block with #554c00 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #554c00 to the mixer and play with it.