Sean Hayes

Adds and allows customization of a visual indicator in WordPress admin for the publish state of your content. 
To help you visually organize your content viewing the All Posts screen choose colors for each post status and see your content displayed with those colors
The plugin also allows you to choose the menu location for the plugin settings page (screen shot #2)
Options included letting you choose from it’s own page or a child of either Settings or Tools menus.

Post Status Indicator

Allow color customization in WordPress admin for the publish state of your content.

Alexandre Froger

Consider the 8 default post statuses that WordPress uses by default: 
* Publish: Viewable by everyone. (publish) 
* Future: Scheduled to be published in a future date. (future) 
* Draft: Incomplete post viewable by anyone with proper user role. (draft) 
* Pending: Awaiting a user with the publish_posts capability (typically a user assigned the Editor role) to publish. (pending) 
* Private: Viewable only to WordPress users at Administrator level. (private) 
* Trash: Posts in the Trash are assigned the trash status. (trash) 
* Auto-Draft: Revisions that WordPress saves automatically while you are editing. (auto-draft) 
* Inherit – Used with a child post (such as Attachments and Revisions) to determine the actual status from the parent post. (inherit)
A typical publishing workflow would be: 
 Auto-Draft > <code>Draft</code> > <code>Pending</code> > <code>Future</code> > <code>Publish</code> 
But what then? <code>Trash</code>? <code>Private</code>? These seem inadapted.
This is where the Unpublished (unpublish) post status provided by this plugin comes into play. 
It allows content publishers to assign a dedicated status to content they desire not to be published, and avoid assigning a semantically inaccurate status.

WP Unpublish

WP Unpublish adds a post status "Unpublished" to your WordPress Posts (Classic Editor).

Post Status Indicator vs WP Unpublish