When you past an RGB color into another RGB illustrator doc 1000 times, it is faster to use spot because at appears in the swatches panel instantly. Otherwise you have to add the color manually 1000 times into the swatches panel. That is how spot came into the RGB picture. The issue is not about spot colors, the issue is from an outsourced InDesign file with color issues and I have never had this color issue before from an outsourced InDesign file. Please stop going on a tagent. Thx
@thomasb14279947 wrote:
When you past an RGB color into another RGB illustrator doc 1000 times, it is faster to use spot because at appears in the swatches panel instantly. Otherwise you have to add the color manually 1000 times into the swatches panel. That is how spot came into the RGB picture.
I realize you don’t want to continue along this tangent, but this is worth noting:
What you describe is using spot colors as a workaround for specifying color inappropriately; instead of using spot colors it would be better to specify your colors correctly. If you paste an object containing a non-spot color into another Illustrator document and its color does not appear in the Swatches panel, then the color was probably defined with Global disabled, meaning that when you apply that color it is not linked to a named swatch. If a color is defined with Global enabled, then it is linked to a named swatch, so pasting an object using that color into another document does carry the named swatch with it into the other document.
Below you can see an example of how using the Global option allows a named swatch to be pasted with an object into a different document.

It’s understandable that you are satisfied because the spot color workaround works, but please realize that everyone is so uncomfortable with it because it is not considered a best practice. The best practice, using the Global option, would also allow named swatches to copy and paste among documents, and with the advantage of being free of the technically incorrect and potentially complicating method of using spot colors in a non-print workflow. (For example, one risk is that if in the future any of the art needed to go to press, then the incorrect use of spot colors would have to be untangled first.)