Von Restorff Effect
An item that differs from its surroundings can receive more attention and be remembered better.
Difference creates emphasis only when the surrounding pattern is quiet enough to reveal it.
A dashboard gives every status the same weight, including the one issue that blocks payroll. Giving that item a clear warning label, distinct shape, and stronger contrast helps the exception behave like an exception.
Origin
Hedwig von Restorff reported the isolation effect in 1933. Her work showed that an item made distinct within otherwise similar material could be remembered better than its neighbors.
Reserve strong contrast for a real priority, exception, or state change. If everything is emphasized, the differences stop carrying meaning.
Build distinction through more than color. A label, shape, position, spacing, or icon can make the meaning clearer and more accessible.
Match the visual difference to the message. A primary action, destructive action, and warning should not all stand out in the same way.
Check whether emphasis helps the task, not only whether it attracts the eye. Attention without clear meaning becomes distraction.
Digital systems
One clear primary action
A form uses one filled button for submission and quieter treatments for secondary actions. The distinction tells the person what moves the task forward without making every control compete.
Physical signals
A marked divider in a notebook
One tab with a distinct shape and label is easy to find among plain pages. If every page has a different bright tab, the useful exception becomes another part of the noise.
Critical actions and ordinary content share the same treatment, or too many elements compete with equally loud styling.
Establish a calm visual pattern, then break it deliberately for the element that needs attention and explain the difference through more than color alone.