Hex #66ab33 or rgb(102,171,51) in RGB space is the tint of olive. It has hue angle of 94.50 degrees, value = 67 and saturation = 70. #66ab33 can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of green, 1 drop of white, 1 drop of black.
Nearest safe hex - #669933. Below you can see the block with #66ab33 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66ab33 to the mixer and play with it.