Branding guidlines

Are there any branding guidlines and pictures a developer can use?

 

Perhaps any plex logos, ...

 

Dropbox made a nice guideline: https://www.dropbox.com/developers/reference/branding

I haven't seen any official guidelines in that regard. I'll try to grab the attention of someone more knowledgeable in that area.

Especially the use of the Plex logo within my apps should be regulated.