I set the "Color" setting in the System Settings to Breeze Dark, launched Kate, wrote some text. Then I selected to print that file to PDF (made sure that the "Printing" schema was selected) and the output was near-white on white.

If I switch the Color setting back to normal Breeze Kate prints black on white normally.

Reproducible: Always

Steps to Reproduce:
1. Switch to Breeze Dark color option
2. Write some text in Kate
3. Print said text (to PDF, for example)

Actual Results:  
The output PDF contained near-white on white text, which was completely unreadable

Expected Results:  
The output PDF cointained black on white, as defined in the "Printing" schema

Even if I switch to the Printing schema in Kate itself while Breeze Dark is enable, it's displayed black on white (as show in the URL demonstration), so it makes me think that the printing thing doesn't "respect" the Printing schema's black normal text.