Admin can change color code of sprint status but User can change sprint status as per the assign access privileges by the admin to that user.
Steps to change color code of sprint status:-
1.Click on "Setting" icon.
2.Select setting from setting drop-down.
3.Page redirect to "Task setting" and Click on "Sprint status setting".
4.Now Click on Created sprint status name then "Edit sprint status" popup window will open.
5. Click on "Color code" Box then change the color code and click on "Save" button.