Passport covers are a practical choice, not a global standard
There is no international rule requiring passports to have dark covers. The International Civil Aviation Organization sets standards for features such as machine-readable information, but countries choose their own cover designs. So an all-white passport is unusual, not forbidden.
The difficulty is practical: a passport is handled constantly, packed beside other items, and carried through rain, dust, and airport queues. A white cover shows fingerprints, grime, and scuffs quickly. Darker colors tend to look presentable for longer, especially on a document expected to last for years.
The cover must also work as a label
A passport cover is a compact identification surface. Its emblem, country name, and document type need to remain easy to see as the cover wears. White can provide strong contrast for dark lettering, but metallic or pale lettering may be harder to read against it; designers choose colors and finishes together to keep the markings legible.
Countries also use cover colors to distinguish different document types or to signal national identity. Those choices become familiar to officials and travelers, making an unconventional color less immediately recognizable even when the passport remains valid.
Why “entirely white” is an especially high bar
A cover that looks white in a photograph may still use embossing, a colored emblem, or a contrasting title. And a passport’s interior pages contain printed text and security features regardless of its cover. The all-white idea is therefore uncommon partly because it offers little practical benefit: it marks easily, departs from familiar designs, and still needs visible identifying details. The result is not a ban, but a design choice few governments have reason to make.
