[This](https://design.firefox.com/photon/components/message-bars.html#color) says the message bar button should be blue but it looks gray in the images. [This](https://design.firefox.com/photon/components/message-bars.html#call-to-action) says it should be gray. All other default buttons are [gray](https://design.firefox.com/photon/components/buttons.html#default-4).
