Not just you, there are lots of complaints. It seems to be account specific rather than a regional login server.
IDK what that means but it's not ideal. Jagex just said they fixed the problem half an hour ago but all that did was let me login to the site. The launcher is still giving a red error.
I'm not seeing any updated information, so I guess it won't be fixed overnight. This seems like a very unusual problem. So all the worlds are up and all the login servers are up? Hmmm.