By default, each task's bar on the Gantt chart takes the color of the resource assigned to it. You can give any task a custom color instead.
Double-click the task to open Task Properties.
On the Details tab, find Color By next to Assign To.
Click the pencil icon next to Color By.
Choose Custom, pick a color and click Save.
Click Save Task.
To go back to resource colors for every task, make sure View > Color Tasks by Assigned Resource is ticked.


