“O” applies with a sheerness that doesn’t match up with the image on the MAC website. It also applies differently than expected based on what it looks like in the tube. Perhaps due to the pearl shimmer or the frost formula this color does not quite apply evenly. It is not unflattering to the naked eye but when a photo was taken with the flash on it was very noticeable.
The formula can be drying so you may want to apply a moisturizing lip balm first. I could not get even application no matter how much I put on, nor could I achieve opaque coverage. The color is a very wearable one though so I would recommend it to those that don't mind the sheerness and the somewhat drying formula.