The image is a design of blue glass.How about using it as background image?
Source Yamachem
Black brick wall pattern. Brick your site up!
Source Alex Parker
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Abstract Tiled Background Extended 12
Source GDJ
A seamless pattern formed from a square tile based on a jpg on Pixabay. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
Prismatic Abstract Background Design
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
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 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Seamless pattern formed from a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Zero CC tileable brick texture, photographed and made by me. CC0
Source Sojan Janso
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
From a drawing of the coat of arms of the Ottoman Empire on Wikimedia.
Source Firkin