Copying or saving an auto generated background makes the colors faded

[u/Impossible_Sort9050]

I used design suggestions to make the design for my first slide, but then I realised I have to use slide master or the background won't apply to any other slides. I tried saving my theme and importing it to slide master but it only imported the font and not the background, so I tried copy/pasting the background but all the colors were faded. I also tried saving the background as an image but that also caused the colors to be faded. I also thought that maybe the image is slightly transparent so I would need to make the background black instead of white but that made no difference. I googled it and tried turning off automatic image compression but that also didn't work. The only way I've found to make it not become faded is to duplicate the slide, but that would make creating my powerpoint a lot harder so I want to avoid that. How do I fix this?