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
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
The following free background pattern has glossy diagonal stripes as a texture to it, and it's colored in a light blue gray color. This background pattern is suitable for using in web design or any other graphic design projects. This applies to all background patterns here.
Source V. Hartikainen
Old China with a modern twist, take two.
Source Adam Charlts
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers