Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Prismatic Polka Dots 3 No Background
Source GDJ
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
Sort of reminds me of those old house wallpapers.
Source Tish
Prismatic Groovy Concentric Background 5
Source GDJ
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless striped fabric-like texture colored in a dark reddish brown color.
Source V. Hartikainen
A nice and simple white rotated tile pattern.
Source Another One
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Retro Circles Background 8 No Black
Source GDJ
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A simple bump filter made upon request at irc #inkscape at freenode. Made a screen capture of the making here: https://youtu.be/TGAWYKVLxQw
Source Lazur URH
Abstract Tiled Background Extended 8
Source GDJ
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk