To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
A comeback for you: the popular Escheresque, now in black.
Source Patten
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
Classic 45-degree pattern, light version.
Source Luke McDonald
I’m not going to lie – if you submit something with the words Norwegian and Rose in it, it’s likely I’ll publish it.
Source Fredrik Scheide
A lot of people like the icon patterns, so here’s one for your restaurant blog.
Source Andrijana Jarnjak
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Prismatic Abstract Geometric Background derived from an image on Pixabay.
Source GDJ
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
Sort of reminds me of those old house wallpapers.
Source Tish
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin