Did you know that the Wildcat was the most successful fighter in WW2?
Yep, that model, that kit are for the Atlantic. I had the good fortune to see that 'Cat fly at Reno back some years ago.
Here's a site that I have found to be pretty reliable, not contradicted by anything else I've read.
http://www.angelfire.com/dc/jinxx1/Wildcat/F4FColors.html
As far as the first ones in the Pacific, I painted up a bunch, some for Lexington at Coral Sea (pretend they are -3s), and some for Hornet on April 18, 1942.
I used MM 205545 Navy Blue Gray over MM 1730 Flat Gull Gray. Others have used Tamiya XF-18 Medium Blue for the Blue Gray. I think it's a little green.
This works for Midway as well, and up until 1943.
You'll see in the link above that the markings change a LOT, so you kind of have to build around those.
I hope this was helpful.
Bill