The image is a jpg, which does not always retain true colors (it's a "lossy" format.) Click the same color block in 3 or 4 different places and you'll get different results.
In order to do a true comparison, you'd have to use a color tool directly on the game or on screenshots taken in a lossless format.
I'm going to give EA the benefit of the doubt here, and suggest that there is almost certainly additional compression on the images from when it was converted to PDF / uploaded to Scribd.
Or, to put it another way, I'm pretty sure EA has a fairly competent legal team, and you don't make such a specific claim in a filing unless you're prepared to back it up.
Copy the image from the complaint into an image editor and look at the RGB values with the color tool. I looked and didn't see a single match.