Hex #9f9d15 or rgb(159,157,21) in RGB space is the tint of yellow. It has hue angle of 59.13 degrees, value = 62 and saturation = 87. #9f9d15 can be obtained by mixing 3 colors: 5 drops of yellow, 1 drop of blue, 2 drops of black.
Nearest safe hex - #999900. Below you can see the block with #9f9d15 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #9f9d15 to the mixer and play with it.