Use of the rule :focus { outline: none; } to remove an outline results in the link or control being focusable but with no visible indication of focus for keyboard users. Even worse, methods to remove it such as onfocus="blur()" result in keyboard users being unable to interact with the link or control.

If you do not like the default focus outline that is displayed when a user clicks on an interactive element, you have 3 accessible solutions:

  1. Style the outline. Webkit browsers have a more prominent glow so you could try styling it to make it less obtrusive. Consider the use of a:focus { outline: thin dotted; } to normalize the look of the outline across browsers.

  2. Style the element itself. You can remove the outline as long as you style the focused element differently (using color, background-color, border or text-decoration: underline for example).

  3. Remove outlines for mouse users only, if you truly must do so. Start without applying any outline: none rules. If a mouse event is detected apply those rules using JavaScript. Remove the rules again if keyboard interaction is detected. Here are 2 examples of accessible outline removal scripts:

    Consider this third solution as a last resort. Some browser/screen reader combinations fire mouse events, which could cause outlines to disappear while using this method.

In conclusion, using outline: none without proper fallbacks makes your site significantly less accessible to any keyboard only user, not only those with reduced vision. Make sure to always give your interactive elements a visible indication of focus.