The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
A seamless striped fabric-like texture colored in a dark reddish brown color.
Source V. Hartikainen
Prismatic Groovy Concentric Background 4
Source GDJ
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
A repeating background for websites with a texture of black groove stripes.
Source V. Hartikainen
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
From a drawing in 'Kingsdene', Maria Fetherstonehaugh, 1878.
Source Firkin
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
A new take on the black linen pattern. Softer this time.
Source Atle Mo