As mentioned by oldsystem here — https://www.reddit.com/r/AdobeIllustrator/comments/1pj3jae/my_4month_list_of_illustrator_2025_issues_state/ — Illustrator doesn’t allow to change a global/spot color in the Color panel by editing a HEX value. We just can’t type there.

However, if we open a Color Picker instead, it’s not a problem — we can enter a new hex value and get the color converted into a normal/process color, with no warning or shy message even about the conversion happened.

Please make these consistent. Allow editing the HEX value and show a shy message, similar to one we see when we convert live rectangles into just paths by moving an anchor.