147: I agree, I have clothing that I use only for Shabbos. I happen to have a shirt that I used during the week. It’s mostly white, with a colored stripe on it. I also happen to have a tie that matches it perfectly. My wife asked me to wear it on Shabbos, as she felt it would be very nice.
Before I did so, I took the other two shirts I have which are similar, and took them out of my rotation of shirts that I use during the week. Then I started using the one shirt for Shabbos. I won’t wear a similar shirt during the week.