From a drawing in 'A Rolling Stone. A tale of wrongs and revenge', John Hartley, 1878.
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
The tile can be had by using shift+alt+i on the selected rectangle in Inkscape
Source Firkin
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Zero CC tileable Crackled Cement (streaks) texture, photographed and made by me. CC0
Source Sojan Janso
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
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A free seamless background pattern for use on websites.
Source V. Hartikainen
Seamless Olive Green Web Background Image
Source V. Hartikainen