You may use it as is, or modify it as you like.
Source V. Hartikainen
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
A repeating background for websites with a texture of black groove stripes.
Source V. Hartikainen
Sometimes you just need the simplest thing.
Source Fabricio
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Sort of reminds me of those old house wallpapers.
Source Tish
An alternative colour scheme for the original background.
Source Firkin