Google Introducing New Visual Design Across All Products
I think the dark grey bar across the top is a big problem for a few UX & psychological reasons.First, it's mentally oppressive. The black bar at the top is like working in a room with a low ceiling painted black all day. It makes you feel boxed in.Next,  lighter colors that exist in the sky (blues, greys) tend to work better at the top of interfaces. If you consider the screen to be your full field of vision and relate it to what your eyes normally see when outside, the top-most area of the screen is "the sky". Making the absolute top part of a webpage black makes me think about a black sky which is ominous and indicates a storm is coming.Finally, it just looks unfriendly and robotic. Blue is a more humanistic color and is more pleasing. I can't think of a worse choice for this newly-redesigned top bar than the dark grey/black they decided on.