I have the same issue with colours. Have tried removing the pbix file and creating it again all to no avail.
Would be great if the colours match all the way through but at the moment I seem to have no ability to lock this down.
A year later and still no solution?
I'm having the same problem with pie charts and bar graphs. I can't publish these for people to look at because the colors don't stay consistent on the same page, and it becomes very confusing.
Being able to set the color on a graph seems like a pretty basic function that should work for a program like this.
Playing with this some more it seems to be related to using colors outside of the selected theme. If you stick to the theme colors, it publishes correctly, but if you select a color outside of the theme, it may be changed after publication.
I'm having the same issue. In this case, "0" are cases where something that should've happened has not happened, so I changed it to red, and switched the section that was defaulted red, and the rest of the colors remain the theme colors.
Power BI keeps changing the color that was originally red back to red when I reopen the saved file, which is...not good. It's happened on basically all of my charts in which I have done this, in different .pbix files.