feat: add brand color to Installation instructions

[jasongitmail]

For #331

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Latest commit: 5c8ac1c85a9ac92cc80e30803c699e2dbac9f84b

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Name	Status	Preview	Comments	Updated (UTC)
shadcn-svelte	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 18, 2023 10:46pm

[huntabyte]

Closing this as not planning for the time being