Which of the following HTML code snippets is the proper way to set the background color of an <h1> tag to be blue?
<blue>
<h1>Hello</h1>
</blue>
<h1 background-color="blue">Hello</h1>
<h1 style="blue">Hello</h1>
<h1 style="background-color:blue;">Hello</h1>
1 answer
<h1 style="background-color:blue;">Hello</h1>