Two of the ways in which you can show an illusion of a button being pressed are: darkening the background-color and nudging its vertical position.

[codepen_embed height=”360″ theme_id=”1820″ slug_hash=”nmEcq” default_tab=”result”]See the Pen Press Time by Brian Dys Sahagun (@BrianSahagun) on CodePen.[/codepen_embed]

It is important to provide for a hint when a user activates an element in your user interface (in this example, a button). The feedback assures the user that the element “responds” to his action.

The advantage of using transform: translateY is that it does not affect the elements around it (unlike using margin or padding).