This background pattern has futuristic look. So, maybe it could be used on websites or blogs dedicated to video games?!
Source V. Hartikainen
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
One more sharp little tile for you. Subtle circles this time.
Source Blunia
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim