This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
The image is a seamless pattern of a fishnet.
Source Yamachem
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
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Sort of reminds me of those old house wallpapers.
Source Tish
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.
Source Sojan Janso
A gray background pattern with a texture of textile. Suits perfectly for web design.
Source V. Hartikainen