CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
A free repetitive background with a dark concrete wall like texture. This one may be used in dark web site designs.
Source V. Hartikainen
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
It’s big, it’s gradient—and it’s square.
Source Brankic1979
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Original minus the background
Source Firkin
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Prismatic Groovy Concentric Background 2
Source GDJ
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
Black brick wall pattern. Brick your site up!
Source Alex Parker
The original has been presented as black on transparent and stored in the pattern definitions. To retrieve the unit tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
An alternative colour scheme for the original background.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen