Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Retro Circles Background 4 No Black
Source GDJ
It’s big, it’s gradient—and it’s square.
Source Brankic1979
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Found on the ground in french cafe in kunming, Yunnan, china
Source Rejon
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Prismatic Abstract Background Design
Source GDJ
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ