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
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
From a drawing in 'Kingsdene', Maria Fetherstonehaugh, 1878.
Source Firkin
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Prismatic Polyskelion Pattern No Background
Source GDJ
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
8 by 8 pixels, and just what the title says.
Source pixilated
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
This was formed by distorting an image of a background on Pixabay.
Source Firkin