Heyoo, PK here lads

So I'm editing a promo video for something (Off GTAS) and I want it to have this sort of beautiful blue-ish view. I created the CC and everything, but I just wanted to know how can we do those blue shades or rays like a beam?
Virtual Insanity 3In
0:17 you can see that Dragun used some sort of a blue ray or shade, and I've seen it with a lot of different editors too. It's also in
1:43, except that it's red-orangish.
I know most of ya have done it, so please help.