Which Revolution server has the most players?

Also which one has the least?

Currently, Yellow has the most and blue has the least number of players.

Yellow does atm,you might have to wait abit to log into it though,thanks to the queue.So if you're looking for a server to start on i'd recommend red as it's the second most populated,and you won't have to wait for the queue to end.

Red was the first PRO server, and has the oldest player accounts logged on it, which also means the economy has had a lot longer to mature. Blue was the second PRO server released, and has the lowest player count, and the second oldest economy, Yellow was the third and last server released thus far, and is the default server on Login, unless you change it, so all of the new players usually end up here, but this also means there will usually be a queue, due to the this server being the 'most popular'