delwinv

A very tiny plugin that adds the ACF field key, field name, Flexible Content field name and Flexible Content layout name to the WYSIWYG 
editor body tag, allowing you to target these classes, along with the existing post-type-* classes added by default by WordPress, in 
your editor-style.css for a better admin/editor experience.
This works for both ACF and ACF Pro, version 5.
<h3>Usage</h3>
<ol>
<li>Install the plugin through the Install Plugins interface or by uploading the <code>acf-plugin-wysiwyg-styling</code> folder to your <code>/wp-content/plugins/</code> directory.</li>
<li>Activate the ACF WYSIWYG Styling plugin from the Admin > Plugins menu.</li>
<li>Create or edit your editor-style.css in your theme directory and use the newly added classes to style your WYSIWYG editors.</li>
</ol>
For example:
<ul>
<li>
The ACF WYSIWYG field with key field_9999ffff11112222 can be targeted with the following CSS:
body.acf-field-key-field_9999ffff11112222 { 
 background-color: red; 
}
</li>
<li>
The ACF WYSIWYG field with key field_9999ffff11112222 in the “room” post type can be targeted with the following CSS:
body.post-type-room.acf-field-key-field_9999ffff11112222 { 
 background-color: blue; 
}
</li>
<li>
All ACF WYSIWYG fields named “my_wysiwyg” can be targetted with the following CSS:
body.acf-field-name-my_wysiwyg { 
 background-color: yellow; 
}
</li>
<li>
All ACF WYSIWYG fields in the Flexible Content field named “page_content” can be targetted with the following CSS:
body.acf-flex-name-page_content { 
 color: green; 
}
</li>
<li>
All ACF WYSIWYG fields in the Flexible Content layout field named “test_layout” can be targetted with the following CSS:
body.acf-layout-test_layout { 
 font-family: “Computer Modern Serif”; 
}
</li>
<li>
The ACF WYSIWYG field named “my_wysiwyg” in the Flexible Content layout field named “test_layout” can be targetted with the following CSS:
body.acf-layout-test_layout.acf-field-name-my_wysiwyg { 
 border: 4px solid red; 
 height: 100%; 
 margin: 0 auto; 
 max-width: 100px; 
}
</li>
</ul>
N.B. I target using the body tag so that a user cannot accidentally target the admin CSS in their edit of the field (regardless of how unlikely 
that would be).

ACF WYSIWYG Styling

Provides the necessary CSS classes in ACF WYSYWIG editor to allow for complete styling of the admin interface.

emrysh

Half Baked Tag Colour Manager lets you set tag colours at multiple levels:
<ul>
<li>Per-tag colour (set on the Tags screen)</li>
<li>Per-post/page colour (set on the editor screen or Quick Edit)</li>
<li>Default tag colour (set in Settings → Half Baked Tag Colour Manager)</li>
<li>Theme default colour</li>
</ul>
Per-tag colours override the post/page colour, which overrides the plugin default.
If you want a consistent “tag pill” look across themes, you can optionally enable pill styling and fine-tune spacing, tint, underline, border thickness, and pill shape.
You can also manage tag case: 
* Choose a Storage case (database normalization) 
* Optionally auto-apply Storage case when tags are created or edited 
* Optionally force a Display case sitewide on the front end 
* Bulk-normalize selected tags from the Tags screen, plus a “Normalize all” option
<h4>How it works</h4>
<ol>
<li>Set colours on Posts → Tags for tags that should always have a specific look.</li>
<li>Optionally set a per-post tag colour in the editor sidebar to apply one colour to all tags on that post.</li>
<li>Optionally set a Default tag colour to cover anything left unset.</li>
<li>Leave styling off if your theme already handles tags the way you like, or enable pill styling for consistency.</li>
</ol>
<h4>Colour resolution order</h4>
When a tag is displayed, the plugin resolves the colour in this order: 
1. Per-tag colour 
2. Per-post or per-page colour 
3. Plugin default tag colour 
4. Theme default
<h4>Privacy and data</h4>
This plugin does not send any data off-site. Colours and settings are stored locally in your WordPress database.
<h4>Uninstall</h4>
Uninstalling the plugin removes plugin settings and any stored metadata created by the plugin.

Half Baked Tag Colour Manager

Set tag colours at multiple levels, including per-tag, per-post, and a default fallback, with optional pill styling and tag case tools.

ACF WYSIWYG Styling vs Half Baked Tag Colour Manager