Hex #99956f or rgb(153,149,111) in RGB space is the tint of yellow. It has hue angle of 54.29 degrees, value = 60 and saturation = 27. #99956f can be obtained by mixing 4 colors: 1 drop of red, 2 drops of magenta, 4 drops of green, 3 drops of white.
Nearest safe hex - #999966. Below you can see the block with #99956f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99956f to the mixer and play with it.