Thank you for voicing! As we built this UI we’ve put effort along the way into designing for folks who are colorblind and other accessibility needs. Sorry to hear we screwed up here.
The circles and squares you’re mentioning are part of an older design to symbolize jobs in a pipeline, whereas these squares you’ve screen-shotted are for parallel runs within a single job. We do have designs created to change those boxes, though we’d like to test them with users first.
Want to do a UX test with us to ensure we nailed it? Happy to share a $50 gift card as a thank you: https://calendly.com/circleci-xteam/60min
Product Manager, Developer Experience