smooth color transition css code example

Example 1: css transition all

-webkit-transition: all .3s ease-in-out;
-moz-transition:    all .3s ease-in-out;
-o-transition:      all .3s ease-in-out;
-ms-transition:     all .3s ease-in-out;
transition:         all .3s ease-in-out;

Example 2: css background color transition

/* Answer to: "css background color transition" */

/*
  Transitions currently work in Safari, Chrome, Firefox, Opera and
  Internet Explorer 10+.

  The following should produce a fade effect for you on the browsers
  mentioned above:
*/

a {
    background-color: #FF0;
}

a:hover {
    background-color: #AD310B;
    -webkit-transition: background-color 1000ms linear;
    -ms-transition: background-color 1000ms linear;
    transition: background-color 1000ms linear;
}