If you want to balance the color easily Id recommend some of the orange gels, I believe they are sold on ebay and there is a guy on these forums that sells them as well. I use them on my android phone all the time to get a lot of the blue saturation out.
It was only a cpl bucks for 3-4 small gels which are perfect for cell phone cameras.
I also make sure I am always using the macro function, helps it focus on the coral.