Peace actually looks like a beige to me, but hetero or homo, you have to breed to find out. In actual truth, we cannot rely on looks to judge if a beige is hetero or homo. It's never 100% accurate. The best way to tell is to breed it. Unless its ancestors have been bred in a way to definitely produce a homo beige with the highest chances. Just still not 100% sure. Maybe 99% or so.

There are actually homo beiges that look dark, and hetero beiges that look light coloured. So cannot guarantee by looks alone.

My Chibi is a beige as well, but I dunno hetero or homo as I've never bred him. Ceres is a confirmed hetero beige as she was used for breeding by her previous owner.