I have multiple Resolution Time Reports on my Dashboard and they are all blue. How do I make different resolution time reports to be of different colors?
If you mean the color of the columns on that chart, you cannot do that with out of the box Jira Cloud. You can only change the thin color bar at the top of the gadget.
There is a suggestion to allow more color configuration here:
And there are likely marketplace add-on features to enhance the charts and colors:
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