Yep I know what you mean - In fact that was the only critique i had of him when i was looking at him: the brown is already quite brown, and he's still practically a hatchling.
On the other hand (i told myself, when deciding if i needed him) the brown has some odd character: it's not just the dullness that hangs out at the top of so many pastels' alien heads, it's a spotty, unfading sort of brown that looks... i dunno... calico-ey? or something? Aside of that, looking at his yellow plus that intense blushing and kind-of odd pattern just made him irresistible.
I very much look forward to seeing how he matures...
Thanks for the feedback guys - glad i'm not just crazy lol