what are the other chicken breeds that u have? It is not the Easter egg layer because they lay a light greenish color. Sometimes they are a light blue. I have Easter egg layer chickens and they lay light green and light blue eggs.
What color eggs do easter eggers lay, and can they lay brown? :) - Page 2
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While EE's can lay a brown egg, I have EE's as do many of my friends and thankfully so far none of them have ever laid a brown egg. The most predominant colors are bluish green, or various shades of green or olive. So while your EE could be laying the brown egg, odds are that it is one of your others.
BYW, all my EE's lay eggs in various shades of blue and green. My olive eggers are all mixes or hybrids and have no EEs behind them.