Anil Sardemann

This plugin distinguishes between block and non block themes to add a fullscreen background image to WordPress. It is set either to the body tag (in case of a non block theme) or to the wp-site-blocks class (in case of a block theme). Upload an image or choose one from your media library. Simple plugin that allows you to set a background image for your website easily.
<a href="https://playground.wordpress.net/?plugin=custom-background-image" title="WordPress Playground Demo" rel="nofollow ugc">Demo</a>

Custom Background Image

Simple plugin that allows you to set a background image easily. Upload an image or choose one from your media library.

Presskopp

Presskopp Admin Background allows you to customize the look and feel of your WordPress admin area by adding a background image with optional overlay color and blur effects.
The plugin is lightweight, fast, and applies all changes instantly.
<h3>Key Features</h3>
<ul>
<li>Live background preview (no page reload required)</li>
<li>Media Library integration for image selection</li>
<li>Adjustable overlay opacity</li>
<li>Custom overlay color picker</li>
<li>Optional blur effect</li>
<li>Instant removal and reset</li>
<li>Automatic saving via AJAX</li>
<li>Clean and minimal UI</li>
</ul>
<h3>Usage</h3>
<ol>
<li>Click “Select Image” to choose a background from the Media Library</li>
<li>Adjust overlay opacity and color</li>
<li>Optionally add blur</li>
<li>Changes are applied instantly and saved automatically</li>
</ol>
To remove the background:
<ul>
<li>Click “Remove” to reset all settings</li>
</ul>
<h3>Features</h3>
Live Editing
All changes are applied instantly without reloading the page.
Overlay & Color
Adjust overlay intensity and choose any color to match your admin UI.
Blur Effect
Add a blur layer for improved readability.
Minimal UI
Controls are only visible when a background image is set.
<h3>Support</h3>
For support and feature requests, please use the support forum on WordPress.org.
Copyright (c) Presskopp – https://presskopp.com/

Presskopp Admin Background

Adds a customizable background image to the WordPress admin with live preview, overlay color, and blur.

Custom Background Image vs Presskopp Admin Background