Hex #808540 or rgb(128,133,64) in RGB space is the tint of yellow. It has hue angle of 64.35 degrees, value = 52 and saturation = 52. #808540 can be obtained by mixing 4 colors: 5 drops of yellow, 3 drops of red, 4 drops of cyan, 4 drops of black.
Nearest safe hex - #999933. Below you can see the block with #808540 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #808540 to the mixer and play with it.