Unless you purchased from an individual or LFS that knows the lineage of the BTA, then I don't think it has a particular name. For example, it's not a Colorado Sunburst, CC Inferno, etc.
Most will refer to these are green-base RBTAs. Some people try to pass them off as rainbow BTAs, but in order to be a true rainbow, it needs to have more than green and red, such as yellow or orange tips.