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
Prismatic Groovy Concentric Background 2
Source GDJ
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
If you want png files of thisu can download them here :
Source Viscious-Speed
There are many carbon patterns, but this one is tiny.
Source Designova
White circles connecting on a light gray background.
Source Mark Collins
From a drawing in 'Prose and Verse ', William Linton, 1836.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Zero CC tileable dry grass texture, photographed and made by me. CC0
Source Sojan Janso
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin