Stick with simply changing the ambience colour settings, bond's shaders do rock but not necessary for what you want, maybe later when your more comfortable with things..
If you were to use this shader to perform colour correction and didn't want the film grain your going to have a lot of shader code which is not being used and it would be pointless uaing a fullscreen shader for such a thing. I dont know your comp's specs but fullscreen shaders can cause unwanted lag,
Change your ambience colour in setuplevel.fpi:
Files\languagebank\english\gamebank\mygame
Lower the red and green values till you get the blue you want.
:state=0:ambience=25,ambiencered=255,ambiencegreen=255,ambienceblue=255
Throw in some white and blue tint lights and you will achieve what you want far easier.
I don't trip over...I do random gravity checks.