How does the Doppler shift change the appearance of stars that are moving toward Earth?

As stars move toward Earth, their light waves are compressed, resulting in a phenomenon known as blueshift. This causes the light emitted by the star to shift toward the blue end of the spectrum, making the star appear bluer than it actually is. Conversely, if a star is moving away, it would exhibit redshift, appearing redder. The amount of shift can provide astronomers with information about the star's velocity and distance.