Hex #999c11 or rgb(153,156,17) in RGB space is the tint of yellow. It has hue angle of 61.29 degrees, value = 61 and saturation = 89. #999c11 can be obtained by mixing 4 colors: 4 drops of yellow, 2 drops of red, 1 drop of blue, 3 drops of green.
Nearest safe hex - #999900. Below you can see the block with #999c11 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #999c11 to the mixer and play with it.