Hex #66a922 or rgb(102,169,34) in RGB space is the tint of olive. It has hue angle of 89.78 degrees, value = 66 and saturation = 80. #66a922 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of magenta, 1 drop of blue, 5 drops of green.
Nearest safe hex - #669933. Below you can see the block with #66a922 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a922 to the mixer and play with it.