[QUOTE=MadyGuzzz;17109557]Why do these photos not look bright like they are suppose to! Their faces look so yellowy! How do I fix these and how do I prevent this from happening again? I used a Canon Speedlite 430 EX II with a Gary Fong lightsphere
1/125 f/2.5 50mm
joedlh tells you how to fix it, here is how to prevent it.
If WB is a constant issue for you. I would get a cheap 80% grey card ($10). Take a picture of this before hand and either custom wb in camera to use the image of the grey card or at least you will have it for PP work to get it set again. Some people say that you can get by with using a sheet of white typing paper. I have yet to try it as i have a grey card.
I learned from my own work, that after sitting in front of a monitor and doing PP. My eyes can be tricked after a while. I always would later go back and recheck my wb and see that it was off. Then i went to a wb card and saved my self a lot of head ache.
From what i have seen, plastic diffusers such as Gary Fong or Sto-fen (plastic cap that fits on head of speed light) Are warmer and a little more yellow than a bare bulb flash. This is why i don't just set my WB to flash. I shoot the WB grey card, as you are not only getting the color from the plastic head, but also picking up light from walls and ceiling as it bounces around the room.
Keep in mind that there is more than just color temp involved, but also the green and magenta tint. Shooting the WB card will also get this more accurate.
Monitor calibration will also affect how you see this compared to others screens. Since you are seeing this as yellow, as i am. I assume that you are at least fairly close. Xrite and Spyder make monitor calibrators. A cheap get me closer idea is to use a pre existing icc profile that fits your monitor for those of us with cheaper monitors.Though not the best solution, it may get you closer.