Oh yuck. Guess I can't win. I am happy (thank you!) because I finally can get my track background back to the light grey instead of dark grey... but because I colorized all my tracks now it looks like someone threw a bag of skittles at my screen. I guess I will have to decide which to live with.
(I colorized the tracks because the tracks do not follow the order of 1,11,21... 2,12,22.... etc. If you copy or clone 10 tracks for example they are all the same color which is what I DON'T want. So I need to find a way around this, or the other thing, or go back to 8.5, or have Sonar update the color customization in X3e or whatever...)