A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
A bit of scratched up grayness. Always good.
Source Dmitry
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
This metal background pattern resembles a metal plate with rivets. Solid rivets on a metal plate.
Source V. Hartikainen
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
A repeating gloomy background image. This one consists of a pattern of black chains layered on top of a dark textured background.
Source V. Hartikainen
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Prismatic Groovy Concentric Background 5
Source GDJ
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
Pattern formed from simple shapes. Black version.
Source Firkin
Prismatic Groovy Concentric Background No Black
Source GDJ
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Snowflakes Pattern No Background
Source GDJ
Prismatic Abstract Geometric Background 4
Source GDJ
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Here's a brown background pattern with subtle stripes. I hope you'll like the color. If not, feel free to change it using an image editor, if you know how of course. Personally, I'm using GIMP to create these backgrounds.
Source V. Hartikainen