The effect is supposed to be very light, almost transparent colour with veins shot through it.
Now, here is the interesting part. To make this paper extra special, I wanted the veins to be metallic. Sadly, unless you have a very expensive professional printer, you are not likely to be able to reproduce metallic colours any more than I can on mine.
So what to do? Well, if you are anything like me, you have a stash of metallic pens. Pick a fine tipped one and LOOSELY follow the veins. Don't try to emulate the thickness of the line or follow it too exactly. I did mine with a gold one.
The file is here
It has been pointed out to me that you may want tiled versions, so I have attempted that - let me know what you think!
Tiled version Marble here
Tiled floral here
I hope you like the effect, if you have graphics editing software, you can even change the tints to suit whatever project you need it for.