An image whose thumbnail is simply a solid color rectangle.

This can happen in a few situations:

* An [[animated]] image or [[video]] whose first frame is solid black or white, which causes the thumbnail to be solid black or white too.
* An image with a [[transparent background]] that was intended to be viewed over a black background, but the transparency was converted to white for the thumbnail.
* A [[thumbnail surprise]] (a two-frame non-looping animation where the first frame is intentionally blank).

h4. See also

* [[blank page]]
* [[missing thumbnail]]
* [[bad thumbnail]]
solid color thumbnail