Thanks, I will look into this, but...
The picture book I maintain online is a mere 2,000 pages of multilayer pdf, as are two books, one comprising another 750 or so. These are of both historic, religious, and political significance. I can't depricate the quality of the product.
Just did this in a few minutes with Inkscape. https://route66custom.com/wp-content/uploads/drawing.pdf
Text could have a little more clarity but I'm sure there's a way to do that. Inkscape has a Fill and a Stroke for anything drawn. Setting the stroke to 0.00 would likely fix it. Could also be a setting during Save As which I didn't touch. Embed text was selected so I left it.
I could have also used the color picker to get the exact maroon. The html # will plug right into Inkscape.
Inkscape would create each page. Name them in succession and put them all in the same folder and a pdf merge would put them all into a single pdf file.
Where there's a will, there's a way.