Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Zero CC tileable brick texture, photographed and made by me. CC0
Source Sojan Janso
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Prismatic Groovy Concentric Background
Source GDJ
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin