Hex #808640 or rgb(128,134,64) in RGB space is the tint of yellow. It has hue angle of 65.14 degrees, value = 53 and saturation = 52. #808640 can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of red, 2 drops of cyan, 2 drops of green.
Nearest safe hex - #999933. Below you can see the block with #808640 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #808640 to the mixer and play with it.