I see that many SE sites have their own logo and unique colour and the others don't. I assumed it may be because those with an icon are out of Beta, but I was wrong, sites like Craft CMS Stack Exchange already have a logo.
My question is, is it an action that the community can do on its own or does it require some sort of a voting or approval from the parent meta? And if its within the community, what is the process to be followed?
Edit: This blog post this effectively answers some part of this question, so let's take this as
"What should our logo and site design look like?"