Please note, this is a STATIC archive of website www.w3schools.com from 05 May 2020, cach3.com does not collect or store any user information, there is no "phishing" involved.
CSS Property:
padding:

Result:
Play with different padding values for this yellow DIV element.
CSS Code:
div#myBox {
  background-color:yellow;
  border: 1px solid red;
  padding:0px;
}
Click the property values above to see the result
W3Schools.com - Play it