css border shades code example

Example 1: box-shadow

blockquote {
  padding: 20px;
  box-shadow: 
       inset 0 -3em 3em rgba(0,0,0,0.1), 
             0 0  0 2px rgb(255,255,255),
             0.3em 0.3em 1em rgba(0,0,0,0.3);
}

Example 2: change button shaddow css

button{
  2.5px 2.5px 2px #888;
}