The reason I called my name Purplebelt360

When I started YouTube, I was also doing karate, so I called my username Bluebelt360 at the time I was a belt below blue but I very soon got my blue belt, hence the username, but now I'm a belt over blue, purple, so I called my username Purplebelt360, but since you can't change YouTube usernames I remained as Bluebelt360, but personally, I'm Purplebelt360.