I don't really have flashbacks anymore(and I hope I never have them again) but when I did it was like going back in time and reliving events.I didn't 'see' the events,I experienced them just as I did when they happened.I wasn't in the present at all.The worst one I had lasted for about 3 days straight and was the most terrifying thing.My husband told me he tried to help me,kept telling me I was having a flashback but that he couldn't get through to me.

So I guess I don't understand the question of whether they are in black or white or sensory because I have never experienced them in that way.

I do get vivid memories that pop in my mind when I've been triggered or get some strong emotions,extreme anxiety,etc. but I've never considered those as flashbacks.I have body memories too but also don't consider them flashbacks.