Normally, if you add a background color property to the
<body> tag, that color fills the entire browser window; however, if you also add a background color to the
<html> tag, the body’s background color fills only the area with content. To see this in action, just preview the web page after completing Step 3 above; then delete the
html tag style, and preview the page again. A weird, but useful bit of CSS trivia.
Tried it without any difference.
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