Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
A repeating background with wood/straw like texture.
Source V. Hartikainen
A free background pattern with abstract green tiles.
Source V. Hartikainen
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Dark blue concrete wall with some small dust spots.
Source Atle Mo
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Colourful background achieved with gradient fills.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee