Most people have their elastic bands changed every four to six weeks by their orthodontist, so you don’t have to commit to one color. Instead, you can look for opportunities that will let you choose fun colors for your braces.
For instance, you could choose:
Green and red bands for Christmas
Red, white and blue bands for Independence Day
Green and white for Saint Patrick’s Day
Orange and black for Halloween
Your school colors for homecoming
You only have to live with your band colors for about a month, so you might as well have fun when the opportunities arise.
https://dentalsave.com/blog/color-braces-choose/