Here's a site that shows various braces Color schemes for various occasions and interests, including the holidays. Pretty cool. Here's an example of a Christmas tree color scheme:
https://bracemateapp.tumblr.com/post/180844738921/christmas-tree-braces-colours-christmas
Although the site focuses on Christmas, there are colors which can be used for Hannukah, Kwanzaa, Winter Solstice, or other holidays. To see more, check out BraceMate. 
