The <code> colour for TinyMCE is not accessible

When you want to display text in TinyMCE as <code> format the pink colour (#E83E8C) is not accessible against a white background: https://webaim.org/resources/contrastchecker/?fcolor=E83E8C&bcolor=FFFFFF

This relates to the Moodle Academy Intro to Accessibility course page: https://moodle.academy/mod/book/view.php?id=1071&chapterid=1130

To replicate:

1. Go to the 'out of the box' Moodle 4.1 demo site.
2. Log in as a teacher.
3. Set the default editor to the new TinyMCE in the User preferences.
4. Go to some text on any page and edit it.
5. Select some text and choose Format > <code>.{}
6. The text appears pink with a background colour in the text editor.
7. Click Save.
8. On the page the background colour disappears and the font colour is the inaccessible pink (#E83E8C).