Hex #999c66 or rgb(153,156,102) in RGB space is the tint of yellow. It has hue angle of 63.33 degrees, value = 61 and saturation = 35. #999c66 can be obtained by mixing 4 colors: 2 drops of red, 3 drops of green, 4 drops of white, 1 drop of black.
Nearest safe hex - #999966. Below you can see the block with #999c66 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #999c66 to the mixer and play with it.