Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
An alternative colour scheme to the original seamless pattern.
Source Firkin
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Zero CC tileable hard cover red book, scanned and made by me. CC0
Source Sojan Janso
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Background formed from the original with an emboss effect
Source GDJ
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin