This is one example of a reflection nebula. This is named the Merope (mer-o-pe) Nebula in the constellation Taurus. It is found among the beautiful star cluster named 'The Pleiades' (plea-ah-dees). This star cluster is also known as M45 (Messier Object 45), and as 'The Seven Sisters'.
The dust and gas of this nebula does not emit its own light. It only REFLECTS the light from the nearby star or stars; in this case, from the star Merope. Under very dark skies, with an optically corrected moderate sized amateur style telescope, you can detect this reflection nebula, as well as additional reflection nebulae regions within the Pleiades cluster. To detect even a faint bluish hue though is quite a task, requiring larger telescopes, and fine optics. Other nebulae will, if at all, show different hues. Reflection nebulae abound in the night sky, and many that are found in concert with Emission Nebulae, next on our tour of Nebulae.