I was gonna make a Xerox logo remake in Blender, but the letters and et cetera were degraded and their pixels were invisible. How must we fix this??!
Maybe Blender has problems qualifying it as a separate object or a hole or yet something else and hence the incomplete filling.
One way out of this is to make the logo in an external app and import it as a plane to Blender. Then, just set the camera to ortographic, add proper world color and you're done.
Or, if you want to do some more Blender work, use it as a background image for your model.