This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Abstract Ellipses Background Grayscale
Source GDJ
Prismatic Groovy Concentric Background 4
Source GDJ
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
A new take on the black linen pattern. Softer this time.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
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
Pattern formed from simple shapes. Black version.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ