A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
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
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Inspired by a JPG that was uploaded to Pixabay by kokon_art
Source Firkin
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
The name is totally random, but hey, it sounds good.
Source Atle Mo
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
There are many carbon patterns, but this one is tiny.
Source Designova
A heavy hitter at 400x400px, but lovely still.
Source Breezi