Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.
Source V. Hartikainen
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
A seamless texture of an abstract wall colored in shades of light orange brown.
Source V. Hartikainen
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
This one is amazing, truly original. Go use it!
Source Viahorizon
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
Might not be super subtle, but quite original in its form.
Source Alex Smith
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
Prismatic Hypnotic Pattern No Background
Source GDJ