An item that differs from its surrounding set can be more memorable. The Von Restorff effect concerns this isolation advantage, rather than a guarantee that a bright button will be clicked. In an interface, a distinctive warning or action can help establish priority when the surrounding presentation remains comparatively quiet.
Contrast is relational. A warning looks distinctive because neighbouring information does not use the same treatment. If every message is enlarged, animated or brightly coloured, the differences stop communicating a useful hierarchy. Choose what actually deserves emphasis and reinforce it with a clear label, placement and shape rather than colour alone. Visual distinctiveness can support noticing, but noticing and remembering are different outcomes; neither proves that a person understood the consequence. Test the important information in the full task and check whether people can recognise it and explain what to do next.
02 / RECOGNISE
See it in real products.
Examples of how the principle can appear in an interface.
Separate a security problem from ordinary item details
1Password places a distinct Watchtower warning on an item with a compromised website. The banner stands apart from the item’s ordinary fields and explains what needs attention. This illustrates selective emphasis; its presence alone does not prove that people remember or successfully resolve the issue.
Make a risky message look different from routine mail
Google’s published Gmail example uses a prominent warning treatment for a potentially risky email. A distinct shape, colour and explanatory message help separate the warning from normal message content. The useful comparison is the surrounding inbox, not the warning viewed by itself.