That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
A pale olive green background with a seamless texture.
Source V. Hartikainen
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A seamless tessellation pattern. To get the tile this is formed from, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
A black tile-able background with paper-like texture.
Source V. Hartikainen
Prismatic Geometric Pattern Background No Black
Source GDJ
This could be a hippy vintage wallpaper.
Source Tileable Patterns
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin