user24076: I want to create a solid color "video" segment in my overall video. In iMovie I can add it by importing a background. I don't see any such feature in Premiere Pro.
How do I add a black (or other color) solid color background to my timeline?

user24076: 
In the workspaces panel, right-click the background and choose New Item > Color Matte...
You can then select any color you want.

See Easily Create a Solid Color Background in Premier Pro 2019 for more details.

24076: <p>I want to create a solid color "video" segment in my overall video. In iMovie I can add it by <a href="https://video.stackexchange.com/questions/26353/how-to-choose-a-custom-solid-background-color-in-imovie">importing a background</a>. I don't see any such feature in Premiere Pro.</p>

<p>How do I add a black (or other color) solid color background to my timeline?</p>
 24076: <ol>
<li>In the workspaces panel, right-click the background and choose New Item > Color Matte...</li>
<li>You can then select any color you want.</li>
</ol>

<p>See <a href="https://www.youtube.com/watch?v=vpCMxcRq24o" rel="nofollow noreferrer">Easily Create a Solid Color Background in Premier Pro 2019</a> for more details.</p>
