Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
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 5 No Background
Source GDJ
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
The image is a design of blue glass.How about using it as background image?
Source Yamachem
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Fix and cc0 to get the tile this is based on.
Source SliverKnight
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
Plywood Web Background background image for use in web design.
Source V. Hartikainen
Prismatic Abstract Background Design No Black
Source GDJ
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard