A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Prismatic Abstract Geometric Background 5
Source GDJ
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
ZeroCC tileable beechwood wood texture, generated in Neo Texture Edit by me. CC0
Source Sojan Janso
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Zero CC tileable hard cover green book, scanned and made by me. CC0
Source Sojan Janso
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
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
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
This background texture resembles stone. It may be used as a background on web pages or on some of their html elements (header, borders, menu bar, etc.). Just modify it for your needs.
Source V. Hartikainen
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein