Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
To celebrate the new feature, we need some sparkling diamonds.
Source Atle Mo
Prismatic Geometric Pattern Background
Source GDJ
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers