Sometimes when we make an image in illustrator they end up with a faded color, it’s because your artboard is preset to a srgb 1966 or a CMYK wb coat, before you start exporting your images, always do a test color no It will be that they do not want to come out.
in the toolbar above called ver (I don’t know what it’s called in English since my illustrator is in Spanish) it’s the third tab from left to right there are some color test options and to be able to change the range but be careful it’s not It is the same to use an RGB1998 as a MAC1988 since they are different platforms.
Now, if there is still a problem with the saturation, you can go to the editing bar in edit colors, I use it so that the colors do not look very gray, it had already happened to me, the colors do not look vivid, which I would recommend it’s between 10 and 20 percent saturation, we don’t want it to be so saturated that it looks like we put it under a black light in a disco.