Printing issue (colors)

After making a custom theme, the colors are okay when viewed,
but after exporting to pdf or trying to print, the colors disappear (like row background colors)


Manager does not support all attributes in HTML or Liquid. They render on screen because your browser and/or operating system do.

But this is important,
We are trying to make same invoices as our firm, (With the style and graphics),

Background row colors is the only thing remaining.

I hope this will be settled soon,

Best regards