I don't think it needs to be off white at all, but I do think that bold colors don't appeal to everyone, and dark colors absorb so much ambient light that the rooms don't show well unless it's the EXACT time of day that the darkness in the room isn't so noticeable.
If I'm recalling correctly, in two rounds of house-hunting the ONLY house we looked at that was all cream (or maybe light grey) was one that was being built on spec. None of the houses where people were actually living or had lived, that had furniture in them, were painted "blank slate."
So I say re-paint the blue room and the brown room to any light color that matches the floors, furniture and the ambient light.
But LBTC has a really good point.
Speed comes from what you put behind you. - Judi Ketteler