Where do you mean? If it's a shadow caused by the light of the Earth it will be very fuzzy due to the size of the light source. Even shadows from the sun will

Where do you mean? If it's a shadow caused by the light of the Earth it will be very fuzzy due to the size of the light source. Even shadows from the sun will be fuzzy if the shadowing object isn't close to the shadowed surface, as the sun is no further away than on Earth, and hence much bigger than the point light source needed for perfectly sharp shadows. If you mean the contrast between lit and shadowed areas, LEO is quite different from e.g. the moon, as even though it's out of the atmosphere, there's a lot of ambient light from the huge close Earth below.