Color block copied from one AI doc, pasted to another AI doc changes the color settings
In one document I have a square that starts as one color. When I copy this square and paste it into another Illustrator document (with the same settings, web, RGB, etc.) it changes the color settings and color itself.
Here is what I start with:

And when I paste that square into another Illustrator document and click into the color, here is what it shows:

I updated Illustrator, I updated my computer, I've checked all color settings in both documents....anyone have any idea of why this is happening? Basically, I want to know what the actual hex code is for the CMYK color: 0/83/100/0 and how to get it to stop changing the color with a simple copy/paste.
Thank you!
Additional info: when I paste into Photoshop and Indesign it's different as well.
This is when pasted into Photoshop:

And this when pasted into Indesign:

