Fix contrast ratio issues for chat page

[jdwilkin4]

Describe the bug

I ran lighthouse on the chat room page, and we got dinged for contrast ratio issues
The issues were pointing to the leave room and send message buttons.

It looks like changing the Leave room button color to bg-red-600 and changing the Send message button color to bg-blue-600 should resolve the issue

Steps to reproduce

1. Go to https://astro-partykit-react-starter.netlify.app/
2. join room
3. Open chrome dev tools
4. Run lighthouse on chat page
5. See lighthouse report for contrast ratio

Expected behavior

Lighthouse should produce 100 score for accessibility

Desktop details

Smartphone details

Additional context

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