Ah you got the picture of supposedly SARS-CoV-2 virus that would cause Covid-19 infection?
Have you experienced observing micro organisms in the electron microscope? What are the colors of nano organism particles you saw in the electron microscope?
Likely those photo colors are enhanced to make them easier to see.
That does not make the photograph a "lie".
Since an electron microscope doesn’t use light “colors” have no direct meaning as a “property” or physical feature of the material. It used to be grey scale was how the image was represented. Colors can be assigned to represent intensity, or some other physical property or just make it more presentable.