Color's aren't true; red & green washed out

Hi.

I just replaced the lamp in my PT-40LC12, as it was getting dim and the replacement warning came up. I thought that would fix all the visual problems, but I still have no strong reds or greens - for instance, watching southpark, kyle's orange jacket and green gloves/hat look the same brownish color. It's all brighter, but still looks like garbage - any ideas as to what this could be?

Thanks!