I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
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
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Prismatic Abstract Geometric Background 5
Source GDJ
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
A floral background formed from numerous clones of flower 117.
Source Firkin
A pale olive green background with a seamless texture.
Source V. Hartikainen
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
Kaleidoscope Prismatic Abstract No Background
Source GDJ
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Feel free to use this seamless background texture as a background on a web site. It's colored in a light pink color and is seamlessly tile-able.
Source V. Hartikainen
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
A repeating background for websites with a texture of black groove stripes.
Source V. Hartikainen