blue belt on the mats, purple belt on the streets.
If you know a purple belt that has the purple rash guard, get it and make sure you wear them on the same day. If you have the blue and purple together it's obvious which is which, but by itself, the blue rashgurd kind of looks purple. Took my gi off at the gym and got clowned. Best was "are you a blue belt on the mats but a purple belt on the streets. " great quality though.