You might need to clarify what you mean by âhighlightedâ. In many browsers, a active input form has :focus styling to make it obvious that it has focus. Thatâs important for accessibility.
As Ralph mentioned, you can use :focus to select an active input element, then style it any way you like to differ from the original input style.
This will give you the border colours that Google uses:-
OK - great - Also - do you know how to make the input box bigger - I can make it wider but I cannot work out how to make it higher. For an example, see www.JohnLewis.com search bar at the top of their page.