What are color xray?

Answer 1

You can't see X-rays, so we don't really have a name for their "color" other than saying they're "X-ray colored".

You might be asking how one could create a color X-ray. One way would be to choose three different wavelengths within the X-ray band and assign each a different color that we CAN see (red, green, and blue) and then combine the image at each wavelength to form a composite color image. This sort of thing is done in astronomy all the time (with various spectral ranges being reassigned to visual; often the wavelengths chosen correspond to lines in the spectra of particular species).

Answer 2

Color x-rays, also known as spectral CT scans, are a new technology that uses multiple energy levels to provide detailed images of body tissues in color. This technology can help improve diagnostic accuracy and provide more information about tissue composition compared to traditional black-and-white x-rays. Color x-rays are still in the research and development stage and are not widely available for clinical use yet.