Black Backgound

I have a black background and the T+Cs when you select Klarna is not visable as the text is black. I have changed the iframe settings but nothing happens. I called Merchant support who told me it “probably” couldnt be changed. I just dont believe Klarna doest work for sites with Black backgrounds. I have also seen about 30 other threads asking the same thing but none have answers other than “we cant give you custom css” which is weird because theres custom CSS all over these forums!

Before i tear my hair out, please, can someone at least give me the CSS class for this bit of text that is hidden? Or even better, i fix for my issue!

TIA

The page I need help with: [log in to see the link]