Printing what I see...

So the problem is, I was able to change slides from a blue background and white-coloured text to white background and black-coloured text, but when I print, it is still a blue background and white font.

I went to Edit>Preferences>Accessibilities and change Custom Colour to white for BG colour and black for font colour.

So how do I print it so its white background and black text?

I went to check the layers. There is only 1 layer, when I make that layer invisible, I print out nothing [a blank page], is it because the text is part of the background? Then in that case, is it impossible to change the settings to what I want originally?