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Slack: highlight unread channels

Dims channels without new messages in the sidebar so the unread ones immediately catch your eye.

Code to copy

/* Dim read channels in the sidebar so unread ones stand out */
.p-channel_sidebar__channel:not(.p-channel_sidebar__channel--unread) {
  opacity: 0.55 !important;
}
.p-channel_sidebar__channel--unread,
.p-channel_sidebar__channel:hover {
  opacity: 1 !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.