<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/392/redwood-ukulele-top.jpg" alt="ukulele">
img { display: block; width: 90%; }

img {
  -webkit-filter: sepia(1);
  filter: sepia(1);
}

External CSS

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External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js