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Trello: highlight cards with members

Outlines in blue any card that has a team member assigned to it.

Code to copy

/* Highlight cards that have any member avatar assigned */
[data-testid="trello-card"]:has([data-testid="card-front-member"]),
.list-card:has(.member) {
  outline: 2px solid #4f8cff !important;
  outline-offset: -2px !important;
  border-radius: 6px !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.