diff --git a/.github/workflows/dev-blue.yml b/.github/workflows/dev-blue.yml
deleted file mode 100644
index ecd2bc21..00000000
--- a/.github/workflows/dev-blue.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-name: Deploy to Dev-blue
-
-on:
-  workflow_dispatch:
-
-jobs:
-  deploy:
-    name: Deploy
-    runs-on: ubuntu-latest
-    permissions:
-      id-token: write
-      contents: read
-    environment: dev-blue
-    concurrency: dev-blue
-
-    steps:
-      - uses: actions/checkout@v2
-      - uses: mbta/actions/build-push-ecr@v2
-        id: build-push
-        with:
-          role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
-          docker-repo: ${{ secrets.DOCKER_REPO }}
-      - uses: mbta/actions/deploy-ecs@v2
-        with:
-          role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
-          ecs-cluster: concentrate
-          ecs-service: concentrate-dev-blue
-          docker-tag: ${{ steps.build-push.outputs.docker-tag }}
-      - uses: mbta/actions/notify-slack-deploy@v1
-        if: ${{ !cancelled() }}
-        with:
-          webhook-url: ${{ secrets.SLACK_WEBHOOK }}
-          job-status: ${{ job.status }}