### Loading

The data should be loaded with different text and background colors in the following order:

* Colors 1-5 use the predefined palette,
* Colors 6-8 use custom CSS colors, not defined in the configuration,
* Color 9-10 use a mix from the predefined palette and custom ones.

The format in the editor content is: `N. [font color]; [background color]`.

### Testing

- Change the font color and font background color on selected text.
- Change the font color and font background color across many paragraphs.
- Check whether the colors are added to document colors list.
