There's a glass divider in the tank as I'm in the prosses of seting up his tank he can see the oscars but can't get to themLikely it is a fader Thai silk. Typically they are a metallic blue, but one with the fader gene will take an orangey blue color similar to that of a male red zebra cichlid. The black is due to the fading.
Though stress is likely in a tank with other cichlids, as I see the Oscar in the back. I’m sure you’ve heard but flowerhorns don’t usually play nice with others, and there may be problems as it grows.