Black isn't really a colour, it's a lack of colour. Ironically, the lighter your skin, the more 'cloured' you are.
I'm suggest that in the absence of visible wavelengths of light, everything in the universe is black, yes.
It's not a red apple in the dark. It's what would be a red apple if there were white light reflecting off of it.
By what assumption do you consider everything in the Universe is ''black''?
You are clearly viewing this from your subjective visual experience and not thinking objectively.