I want to say the Blue Laced chick that you said looks gray brown, looks just like my choc silver lace
I always thought it looked "different" but really don't know what it is. I'm also wondering if it is one of @Junibutt 's elusive choc mottled orps.
BTW- You may notice some food coloring on a couple chicks so I could tell them apart right after hatch. I marked all the EE-Orps with bright green because they look exactly the same as the purebreds. I also marked 2 lav orps that we're keeping with purple and the blue laced orps with blue. I've had several visitors ask about it. Whenever I say something like, "It's a blue laced orp," I've been hearing, "Wow! I never knew chickens came in such bright colors!"