From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
This one needs to be used in small areas; you can see it repeat.
Source Luca
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
Sharp but soft triangles in light shades of gray.
Source Pixeden
U.S.-based National Fire Protection Association standard fire diamond for flagging risks posed by hazardous materials. The red diamond has a number 0-4 depending on flammability. The blue diamond has a number 0-4 depending on health hazard. The yellow has a number 0-4 depending on reactivity. the white square has a special notice, e.g OX for oxidizer.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Prismatic Geometric Pattern Background
Source GDJ
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. A version of the original with random colors.
Source Firkin
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha