A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
An orange vertically striped background pattern. Feel free to download and use this orange background pattern, for example, on the web). It resembles a wallpaper with vertical stripes or something similar to it.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen