feat: change theme color to reflect the theme

[Pagebakers]

Checklist

• [x] run make test
• [x] PR title must follow conventional-commit-standard
• [x] tests and/or benchmarks are included
• [x] documentation is changed or added
• [x] commit message and code follows the Code of conduct

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Name	Status	Preview	Updated
wundergraph-docs	✅ Ready (Inspect)	Visit Preview	Sep 3, 2022 at 8:42AM (UTC)