background-blend-mode-body-image.html

<!DOCTYPE HTML>
<style>
body { 
    background-image: linear-gradient(green, green);
    background-blend-mode: screen;
}
</style>
<p>This test will check that a background-image set on body does not blend with the browser's white background color.<br/>
The test passes if the page has a green background.</p>

chromium/third_party/blink/web_tests/css3/blending/background-blend-mode-body-image.html