With a poster called “lovinghalacha” it comes time to bring Orach Chaim 53:18 back on the table.
From it we can see that we did not fix how those who lead davening should dress. You can dress in either white or colored clothing. However, other religions did fix a requirement that only white be worn. Hence, if someone is asked to lead services and refuses because he has colored clothes on, he creates a cloud of suspicion on himself for that prayer only.
Our over 2000 year Mesorah is not to be particular about what color a would be leader of services dresses in.