Hex #668e44 or rgb(102,142,68) in RGB space is the tint of olive. It has hue angle of 92.43 degrees, value = 56 and saturation = 52. #668e44 can be obtained by mixing 4 colors: 4 drops of yellow, 2 drops of magenta, 4 drops of blue, 5 drops of green.
Nearest safe hex - #669933. Below you can see the block with #668e44 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #668e44 to the mixer and play with it.