The Light Phone III eschews the e-paper screen found with the previous models, opting for a sleek black-and-white OLED. It still doesn’t offer any access to social media, the internet or even email.

For instance, under the same illumination, white reflects much more light to the eye than black does. But a white surface in shadow often reflects less light to the eye than a black surface in sun.

And once the election process for a new pope begins, gatherers will turn upward each day, waiting for black or white smoke to fill the sky. Francis died on Easter Monday, April 21. He was 88 years ...