The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Inspired by a design found in 'Konstantinápolyi emlékeim', Miklos Chriszto, 1893.
Source Firkin
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
Abstract Tiled Background Extended 12
Source GDJ
You guessed it – looks a bit like cloth.
Source Peax Webdesign
A background pattern with blue on white vertical stripes.
Source V. Hartikainen
Prismatic Hexagonalist Pattern No Background
Source GDJ
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen