These pictures are either taken by Hubble most likely, or through X-Ray observation. Which means there are initially no colors on it. Nevertheless the process of adding color is made in order to retranscribe at best the "real" colors (it is not just an artistic view)
Here is some documentation on how it's done, if you're curious :
https://www.cnet.com/news/how-and-why-are-the-hubble-telescope-images-coloured/