Hex #808737 or rgb(128,135,55) in RGB space is the tint of yellow. It has hue angle of 65.25 degrees, value = 53 and saturation = 59. #808737 can be obtained by mixing 4 colors: 5 drops of yellow, 2 drops of red, 3 drops of cyan, 4 drops of black.
Nearest safe hex - #999933. Below you can see the block with #808737 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #808737 to the mixer and play with it.