When using the embedded editor in the LMS, Ally shows us the accessibility score in the upper right corner of the editor:

Below we show you how to improve the score with the text editor thanks to Ally, by modifying two headings whose contrast is poor:

When you click to edit, Ally will highlight the paragraphs with low contrast with a box. In the right panel, it also indicates what is wrong and how to fix it, and offers colors that improve that contrast.

You can click the color you want to apply it to all the headings at once and save.