This is so subtle you need to bring your magnifier!
Source Carlos Valdez
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Remixed from a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
An abstract pale yellow paper-like background with stains colored in yellow and green.
Source V. Hartikainen
I’m starting to think I have a concrete wall fetish.
Source Atle Mo
The image depicts a shell seamless pattern.I used an OCAL clipart called "Shell" uploaded by "jgm104".Thanks.
Source Yamachem
Black brick wall pattern. Brick your site up!
Source Alex Parker
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
This background image is great for using in web design or graphic design projects. And don't forget to visit the homepage. I frequently update this resource with fresh tileable backgrounds.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin