customize the color palette for tracks and clips

No, this is currently not planned. Adding user definable colors would break te GUI color scheme as some colors don't work for clips (used for other interface elemtents and resulting and contrast problems etc.). However, adding more colors to the current palette is a prominent point on the wish list, as the current collection could be bit bigger, for sure.

Add more option to colour tracks (instead of the bitwig grey) in the mixer is a default feature in protools, If they can do it bitwig can do it. That the reason to bypass the mixer in bitwig: no clean colour difference between tracks. I constantly need to check the name on the top screen, change fader on de lower part of the screen: killing workflow. And with grouped tracks it becomes more frustrating.

I will join the wishes for increasing the color palette. The basic set is clearly not enough for comfortable work. Especially in projects with a large number of tracks and the active use of their grouping.