Brand colour colliding with a system meaning
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Rule · bucket: judgment · severity: note · detector: none · since: v0.1.0
Section: Things to avoid
Group: States and interaction

Forbidden:
  A red brand colour used for links and primary buttons, on an interface that also uses red for errors and destructive actions

Instead:
  Where the brand colour is red, amber or green, do **not** use it for interactive elements. Use `--color-text-strong` for links and buttons and keep the brand colour decorative.

One colour cannot mean both "act on this" and "something is wrong" without teaching the user that neither is reliable. The system colours have prior claim, because their meanings arrive with the user.