Inspired by a pattern I saw in a 19th century book. This seamless pattern was created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
It looks very nice I think.
Source V. Hartikainen
Prismatic Groovy Concentric Background 4
Source GDJ
Prismatic Abstract Geometric Background 4
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Continuing the geometric trend, here is one more.
Source Mike Warner
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
Prismatic Abstract Geometric Background 5
Source GDJ
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Prismatic Curved Diamond Pattern No Background
Source GDJ
Prismatic Geometric Pattern Background 2 No Black
Source GDJ
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen