Proposal: a red favicon

Created by: city41

Is your proposal related to a problem?

CRA uses the same favicon as reactjs.org. When developing, I often have both my app running in a tab, and React documentation in other tabs:

Describe the solution you'd like

If CRA used a red favicon, it could help distinguish these tabs. The red favicon also draws a bit more attention to itself, to help the developer remember to replace it with the app's actual favicon.

I often use CRA as a "scratchpad" just to quickly try something out, and often in that case I'm also referring to React documentation. So in that case I don't really care about swapping to a new favicon. An already red favicon would be helpful in this situation.

Red is nice as the React dev tools use a red icon to indicate a site is in dev mode. It would convey a similar meaning here too. There may be accessibility concerns. I believe the dev tools have a slightly different icon along with the color change to help with that.

Additional context

This is obviously a small feature request and its impact is on the small side. But the effort to implement it is pretty small too IMO.