render-surface-alpha-blending.html | Explore in Territory

<html>
    <head>
        <style>
            #layer {
                will-change:transform;
                opacity: 0.75;
                background-color: rgb(0, 100, 0);
            }
            #child {
                will-change:transform;
            }
            #base {
                background-color: rgb(200, 0, 0);
            }

            .fullpage {
                position: fixed;
                top: 0px;
                left: 0px;
                width: 100%;
                height: 100%;
            }
        </style>
    </head>
    <body>
        <div id="base" class="fullpage"></div>
        <div id="layer" class="fullpage">
            <!-- layer needs to have a child with content -->
            <div id="child"><canvas width="1px" height="1px"></canvas></div>
        </div>
    </body>
</html>

chromium/third_party/blink/web_tests/compositing/render-surface-alpha-blending.html