Turn off frame blend without spawn menu

Is there a way I can turn off frame blend or other PP effects without the spawnmenu? I accidentally fucked up the settings and now I lag like hell and can’t see my spawn menu, pause menu or anything!

I can see the main menu but as soon as I go ingame I need to use task manager to exit as I cannot click quit cause I can’t see it.

pp_fb 0 IN GAME.

[editline]9th June 2014[/editline]

Into console (~)

This worked perfectly, Thanks for the help.