LayoutTests/css3/filters/effect-invert.html

<script>
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<img style="-webkit-filter: invert(0)" src="resources/reference.png">
<img style="-webkit-filter: invert(0.2)" src="resources/reference.png">
<img style="-webkit-filter: invert(0.4)" src="resources/reference.png">
<img style="-webkit-filter: invert(0.6)" src="resources/reference.png">
<img style="-webkit-filter: invert(0.8)" src="resources/reference.png">
<img style="-webkit-filter: invert(1.0)" src="resources/reference.png">