Alvaro

<a href="https://gutenberg-showcase.melonpan.io/image-color-palette" rel="nofollow ugc">Demo</a> – <a href="https://melonpan.io/wordpress-plugins/image-color-palette" rel="nofollow ugc">Documentation</a> – <a href="https://github.com/garciaalvaro/image-color-palette" rel="nofollow ugc">GitHub</a>
Image Color Palette provides a simple utility to generate a color palette based on the dominant colors of an image. It also creates color schemes based on the image colors.
The colors can be copied to the clipboard and pasted in a color picker. When a registered block is selected the plugin permits applying the color to certain block attributes like text or background color.
<h3>Color schemes</h3>
Available schemes include:
<ul>
<li>Analogous</li>
<li>Monochromatic</li>
<li>Triad</li>
<li>Complementary</li>
<li>Lighter</li>
<li>Brighter</li>
<li>Darker</li>
<li>Desaturated</li>
<li>Saturated</li>
</ul>
<h3>Usage</h3>
Go to any post editor where the new Gutenberg editor is enabled. 
Inside the Post editor on the right side of the top Toolbar the plugin icon/button should appear (if not, please read the FAQ below). 
Click the icon/button to open the plugin sidebar. 
Click the main button and the Media Library will open. Select an image and click the Select button. 
A color palette will be created based on the colors of the image. 
Click on any of the colors and a menu will appear. 
The color can be copied to the clipboard (in HEX format) and pasted in the color picker of any block. 
For supported blocks, the menu will display extra options to apply the color directly to the Block attributes.
<h3>Credits</h3>
Banner image belongs to <a href="https://unsplash.com/@heysupersimi" rel="nofollow ugc">Simone Hutsch</a>.

Image Color Palette

Good for creating stylish and unique posts.

Nice one!

Create a color palette based on the colors of an image.

minimus

Adds little style sheet file and short code to blog for highlighting some portion of text in a post as colored boxes. 7 styles are available. That may be warning, alert, info and download styled portion of the post’s text.
If you need to explore the source code of plugin, you can find it on <a href="https://github.com/minimus/wp-special-textboxes" rel="nofollow ugc">GitHub</a>.
Available languages:
<ul>
<li>English</li>
<li>Russian</li>
</ul>
If you have created your own language pack, or have an update of an existing one, you can send .po and .mo files to me (minimus AT simplelib.com) so that I can bundle it into Special Text Boxes.
Real examples of outputs you can see on the <a href="http://www.simplelib.com/archives/wordpress-plugin-wp-special-textboxes/" rel="nofollow ugc">plugin page</a>
<a href="http://stb.simplelib.com/info/compare-stb/" rel="nofollow ugc">Compare feature set</a> of different editions of the STB plugin and choose exactly what you need.

Special Text Boxes

Highlights any portion of text as text in the colored boxes.

Image Color Palette vs Special Text Boxes