An attempt for cleaning up the original image in a few steps.
Source Lazur URH
You can never get enough of these tiny pixel patterns with sharp lines.
Source Designova
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Might not be super subtle, but quite original in its form.
Source Alex Smith
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
Geometric triangles seem to be quite hot these days.
Source Pixeden
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
This background texture resembles stone. It may be used as a background on web pages or on some of their html elements (header, borders, menu bar, etc.). Just modify it for your needs.
Source V. Hartikainen
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen