Explanation:
AWS specifically recommends Blue-Green for super-fast, zero-downtime deploys – and thus rollbacks, which are redeploying old code. You use various strategies to migrate the traffic from your current application stack (blue) to a new version of the application (green). This is a popular technique for deploying applications with zero downtime.
Reference:
https://d0.awsstatic.com/whitepapers/overview-of-deployment-options…