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
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Feel free to use this seamless background texture as a background on a web site. It's colored in a light pink color and is seamlessly tile-able.
Source V. Hartikainen
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Looks like an old wall. I guess that’s it then?
Source Viahorizon
Remixed from an image on Pixabay, the original having been uploaded by darkmoon1968.
Source Firkin
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry