Hex #99977d or rgb(153,151,125) in RGB space is the tint of yellow. It has hue angle of 55.71 degrees, value = 60 and saturation = 18. #99977d can be obtained by mixing 4 colors: 4 drops of yellow, 5 drops of magenta, 4 drops of cyan, 2 drops of green.
Nearest safe hex - #999966. Below you can see the block with #99977d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99977d to the mixer and play with it.