Others have linked the decision to revert to a blue colour palette to Zuckerberg's much-mocked suggestion that corporate America needed more "masculine energy”. There's also some debate about how the rebrand will be read longer term. Blue is often considered to communicate trust – which Meta could do with earning more of as it pushes its Meta AI tools in Messenger. But some suggest the change will have the opposite effect. "This is a company going backwards to their 'old ways'," one person suggested on Reddit.
https://www.creativebloq.com/design/logos-icons/metas-changed-the-facebook-messenger-logo-at-the-worst-possible-time