Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
A seamlessly tile-able grunge background image.
Source V. Hartikainen
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Just like the black maze, only in light gray. Duh.
Source Peax
Black And White Floral Pattern Background Inverse
Source GDJ
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
More in the paper realm, this time with fibers.
Source Jorge Fuentes
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
A seamless texture of a rough concrete surface.
Source V. Hartikainen
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Prismatic Triangular Background Design Mark II 5
Source GDJ
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
A white version of the very popular linen pattern.
Source Ant Ekşiler