I've tried every single color setting and adjustment on my ViewSonic. I honestly must have spent hours coming up with new combinations. Don't get me wrong, it's a good monitor and I may end up selling it on ebay or something, but it just isn't QUITE as bright as my Dell. HOWEVER, I think that's how it was since day 1. It seems bright on its own, but if you compare it vs another monitor, you can notice a difference. I didn't notice it until I added a second monitor to run dual screen on my computer. My 19 and 24 get really bright, but they get "stupid bright." Like much brighter than I would ever want.
Currently my 19's settings are 100% on all 3 colors, contrast @ 20/100 and brightness @ 20/100. Anything above 40 on the contrast/brightness of this monitor, and I really don't notice a change. Honestly as it jumps from 40 on up to 85, 90, 95, I really don't see it increase much at all. Whereas my Dell and ViewSonic both have steady incremental steps from 0 on up to 100... but like I said, the ViewSonic always had a warmish hue to it. I like it, I just found a deal when I was browsing, acted on it, and here I am. Haaar!
Another thing about the ViewSonic was the height of the base... with the height of my desk along with the height of the ViewSonic monitor, it was kind of a pain. The ViewSonic would be perfect for my brother, as he's got a much lower desk. My Dell + my 19 sits a lot lower, so they go good together on my desk which is why I chose 19/24 instead of 22/24.