Text contrast in `ThumbnailCarousel`

[stephiescastle]

Text contrast in partially visible slides isn't passing accessibility tests. These slides are more "decorative," so I'm not quite sure how to handle this, or even if they are truly decorative or not.

http://localhost:6006/?path=/story/templates-pageimagedetail--base-story

I've removed PageImageDetail from our CI accessibility tests. We should re-enable tests for this component once we work out the best way to handle this.

Another Oddity: The ThumbnailCarousel tests pass. It is specifically how that component is used in PageImageDetail that doesn't pass.

[Scotchester]

That's an interesting one. I think you could argue that it's not important for the text to be legible, that the whole card is there to hint that there is more in the carousel. Not sure how to tell the automated tests that, though…

[Archetipo95]

Did you try with aria-hidden attribute?

[stephiescastle]

I updated thumbnail carousel to dynamically add/remove aria-hidden based on when slides are fully visible (see #739 (review)), and it still gets flagged by our accessibility tests.