Hex #aaa81c or rgb(170,168,28) in RGB space is the tint of yellow. It has hue angle of 59.15 degrees, value = 67 and saturation = 84. #aaa81c can be obtained by mixing 4 colors: 3 drops of yellow, 2 drops of red, 3 drops of green, 1 drop of white.
Nearest safe hex - #999933. Below you can see the block with #aaa81c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #aaa81c to the mixer and play with it.