Accessibility replace colors

[emf]

OK, I've attached a page. Please note that an earlier version of Foxit — before the introduction of the ribbon — would ignore the grayish background...

[emf]

No, the box in the document is not an image object. They have just added a gray background to make it more prominent, I suppose. It would be preferable...

[emf]

I am not sure what "a scanned document that is image based" is, however its text is searchable and can be highlighted, unlike some old documents...

[emf]

I uploaded to screenshots of Foxit. In both, in Accessibility in the Preferences I have specified yellow text on black background. In the first, the background...

[emf]

In Accessibility replacing colors works only with black on white. How can I replace the background when its gray?