How to assign specific colors for reportvalues at the X- axis?

Hello there,

I have two Incident reports reporting Incident States on the X- axis. 
Now I defined specific colors for both reports, by the settings as seen here below:
- "Cart color = Use several colors"
- "Colors = A few HEX color codes"

This works good for the first report, but the second report shows for each Incident State value, a different color (within the few given HEX color codes). I fixed this by re- arranging the HEX color codes in a different way this second report, for example,
- Report 1 colors = 1, 2, 3, 4,
- Report 2 colors = 4, 2, 3, 1
Came back at work today, to see the previous problem with report 2 back again.

How can I solve this permanently? I want only specific colors for this two reports (and they have to be the same to eachother). I don't want to define specific Incident State colors for the whole instance and all reports.

Thanks!