SceneKit color management: gamma correction and color spaces.

I try to create app for Swift Playgrounds and i have problem with displaying 3D scene (using SceneKit). If i compare displaying in scene editor in Xcode and in Swift Playgrounds i have darker displaying on second one. But if i build project as common app (not Swift Playground) i have the same displaying. I think it is happened because of bad gamma correction or different color spaces. Could you tell me how i can configure it if it posssible?