Blue/Green deployments have been an important, if rarely implemented, technique in the Continuous Delivery playbook for years. Their aim is simple: provision, deploy, test — and optionally roll-back — your application before it's served to the public. Betterment's deployment architecture takes a similar, but more straightforward approach, accomplishing the important goals sought out by Blue/Green practitioners. Dubbed 'Cyan' (a mixture of Blue/Green), Betterment uses Ansible to provision new instances, push the latest artifacts to them, and ensure that they're healthy before marking them ready for production. All this ensures fast, stable, zero-downtime rollout with minimal human interaction. We'll discuss Betterment's philosophical approach to shipping new code and then dive into the nitty-gritty Ansible that powers the whole thing.