Hex #669833 or rgb(102,152,51) in RGB space is the tint of olive. It has hue angle of 89.70 degrees, value = 60 and saturation = 66. #669833 can be obtained by mixing 4 colors: 4 drops of yellow, 3 drops of blue, 2 drops of green, 1 drop of black.
Nearest safe hex - #669933. Below you can see the block with #669833 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #669833 to the mixer and play with it.