I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
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
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
This one is amazing, truly original. Go use it!
Source Viahorizon
Honestly, who does not like a little pipe and mustache?
Source Luca Errico
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
A seamlessly tile-able grunge background image.
Source V. Hartikainen
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Feel free to download and use it, or see the rest of the dark background patterns that I have made. Anyway, I hope you will find something that you like.
Source V. Hartikainen
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
A free seamless background pattern for use on websites.
Source V. Hartikainen