EEs typically have pea combs. The EE offspring that lack pea combs usually lack the blue egg gene, however there are exceptions.
Easter egger Roosters chicks question - Page 2
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His comb looks like the funky comb you get sometimes when you cross breeds with two different combs and the legs actually look slate to me. He's definitely a mixed breed, but at this point there is no way to know for sure whether or not he carrries the blue egg gene. If some of his offspring lay green eggs, you will know that he carries the blue gene and is an Easter Egger. Until then, it's just a matter of wait and see.