Red-/blue-shift refers to the Doppler shift in the absorption/emission lines in the spectrum, not the color of the objects. The color of stars (galaxy color is in large part due to the composite color of all contained stars) is largely due to temperature. Red stars are cooler while blue stars are hotter.
Robert Walker’s answer in this thread gives a thorough rundown of star colors in this thread: https://www.quora.com/If-a-distant-star-is-red-does-it-mean-its-really-far-away
I understand enough to know that it has to do with not being able to resolve point sources, which I know has to do with lens aperture diameter.
I would like to learn, though, so I would appreciate any extra information or resources!
Here's an r/AskScience thread on the image mentioning that diffraction spikes have to do with the telescope's point spread function (another thing for me to learn about): https://www.reddit.com/r/askscience/comments/2sn7dn/why_do_only_stars_have_refraction_spikes_in_this/
@evilscientistca Diffraction spikes?
If so, I see two: one bright [¹] one just above centre in the bottom right quadrant and a still bright but somewhat fainter one about the same place in the top left quadrant.
[¹] Yeah, probably unimaginably faint by normal standards.
The diffraction spikes are because stars are too small to be resolved by the telescope.
/u/lmxbftw‘s answer in this thread is a good explanation of the phenomenon: https://www.reddit.com/r/askscience/comments/2sn7dn/why_do_only_stars_have_refraction_spikes_in_this/