Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
From a drawing in 'Worsborough; its historical associations and rural attractions', Joseph Wilkinson, 1879.
Source Firkin
Remixed from a drawing in 'An Index to Deering's Nottinghamia Vetus et Nova', Rupert Chicken, 1899. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
A free web background image with a seamless concrete-like texture and an Indian-red color.
Source V. Hartikainen
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Mostly just mucked about with the colours and made one of the paths in the lead frame opaque. The glass remains transparent.
Source Firkin
A repeating background with wood/straw like texture.
Source V. Hartikainen
Fix and cc0 to get the tile this is based on.
Source SliverKnight
From an image on opengameart.org shared by rubberduck.
Source Firkin
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Remixed from a drawing in 'Some account of the Worshipful Company of Ironmongers', John Nicholl, 1866.
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin