Hex #99a21a or rgb(153,162,26) in RGB space is the tint of yellow. It has hue angle of 63.97 degrees, value = 64 and saturation = 84. #99a21a can be obtained by mixing 4 colors: 5 drops of yellow, 1 drop of green, 1 drop of white, 3 drops of black.
Nearest safe hex - #999933. Below you can see the block with #99a21a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a21a to the mixer and play with it.