Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
Black & white version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
From a drawing in 'A Rolling Stone. A tale of wrongs and revenge', John Hartley, 1878.
Source Firkin
Abstract Tiled Background Extended 11
Source GDJ
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Prismatic Groovy Concentric Background 4
Source GDJ
If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
This was formed by distorting an image of a background on Pixabay.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
This was submitted in a beige color, hence the name. Now it’s a gray paper pattern.
Source Konstantin Ivanov
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy