This is currently not supported in the text editor that we use in Chamaileon.
We plan to have a custom list item element in the future, where you would be able to define your own list items and their colors as well. This functionality cannot be built into the text editor unfortunately, that's why it's way more complex to add to the software than it should be.
What you can do in the meantime:
Instead of using the standard list item in the text editor add your own list item icons as a regular text
Then you'll be able to color it according to your needs
Let us know if you have more questions!