feat(card): Update dark appearance colors

[EnMod]

🎟️ Asana Task 🔍 Preview Link

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Description

This PR updates dark appearance styles for <Card /> to align with our new set of color tokens.

PR Checklist 🚀

Items in this checklist may not may not apply to your PR, but please consider each item carefully.

• [x] Add Asana and Preview links above.
• [ ] Conduct thorough self-review.
• [ ] Add or update tests as appropriate.
• [ ] Conduct reasonable cross browser testing for both compatibility and responsive behavior (We have a Sauce Labs account for this, if you don't have access, just ask!).
• [ ] Conduct reasonable accessibility review (use the WAS as a guide or an axe browser plugin until we establish more formal checks).
• [ ] Identify (in the description above) and document (add Asana tasks on this board) any technical debt that you're aware of, but are not addressing as part of this PR.

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Latest commit: fda88aec0bfd17634c3bfba50c31f0a9fe74984e

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Name	Status	Preview	Updated (UTC)
react-components	✅ Ready (Inspect)	Visit Preview	Aug 9, 2023 9:26pm

[EnMod]

Whoops! Closing in favor of #992 🙂