Printing in Color

Hi,
I'm pretty sure I'm missing something but PHPRunner-generated List or View interfaces can be printed in color, right?

I'd like to be able print this example list to PDF in color but, with Print in Color and Background Graphics selected, no dice. Same results with 3 different PDF drivers.

https://www.customdataservices.net/automobiles/catalog_list.php

I checked and the same applies to these examples as well...

https://customdataservices.net/bicycleshop/customers_list.php

https://customdataservices.net/imagefiles/catalog_list.php

These examples are all Enterprise 10.91 but the same results occur in V11.

I'm using a pretty basic Windows11 workstation, don't think it's my local config as several other applications print to PDF in color as expected.

Any assistance would be greatly appreciated.