Hex #66a322 or rgb(102,163,34) in RGB space is the tint of olive. It has hue angle of 88.37 degrees, value = 64 and saturation = 79. #66a322 can be obtained by mixing 4 colors: 4 drops of yellow, 2 drops of blue, 3 drops of green, 1 drop of black.
Nearest safe hex - #669933. Below you can see the block with #66a322 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a322 to the mixer and play with it.