If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
A free grid paper background pattern for using on web sites.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
A comeback for you: the popular Escheresque, now in black.
Source Patten
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
Retro Circles Background 7 No Black
Source GDJ
Might not be super subtle, but quite original in its form.
Source Alex Smith
Prismatic Polyskelion Pattern No Background
Source GDJ
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin