35mm
The coloured bars work for me in tungsten. I can't think of anything worse than lurid, coloured strips ruining the dark interface. So while I hope you get what you want from the bakers, I also hope they make it an option so that it isn't imposed on those of us who don't want it. I kind of feel it is an option at the moment though depending which theme you choose.
I totally agree, I much prefer the 'clean cut' lines of the current tungsten theme. If there's a way to introduce a new theme with the option of coloured strips, then I guess we'd all be catered for.